US20050191555A1 - Battery including carbon foam current collectors - Google Patents
Battery including carbon foam current collectors Download PDFInfo
- Publication number
- US20050191555A1 US20050191555A1 US11/098,458 US9845805A US2005191555A1 US 20050191555 A1 US20050191555 A1 US 20050191555A1 US 9845805 A US9845805 A US 9845805A US 2005191555 A1 US2005191555 A1 US 2005191555A1
- Authority
- US
- United States
- Prior art keywords
- current collector
- carbon foam
- electrode plate
- foam current
- battery
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 87
- 239000011148 porous material Substances 0.000 claims abstract description 52
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 50
- 239000002023 wood Substances 0.000 claims description 46
- 229910002804 graphite Inorganic materials 0.000 claims description 34
- 239000010439 graphite Substances 0.000 claims description 34
- 239000006260 foam Substances 0.000 claims description 15
- DOARWPHSJVUWFT-UHFFFAOYSA-N lanthanum nickel Chemical compound [Ni].[La] DOARWPHSJVUWFT-UHFFFAOYSA-N 0.000 claims description 5
- 229910021511 zinc hydroxide Inorganic materials 0.000 claims description 5
- PLLZRTNVEXYBNA-UHFFFAOYSA-L cadmium hydroxide Chemical compound [OH-].[OH-].[Cd+2] PLLZRTNVEXYBNA-UHFFFAOYSA-L 0.000 claims description 3
- BFDHFSHZJLFAMC-UHFFFAOYSA-L nickel(ii) hydroxide Chemical compound [OH-].[OH-].[Ni+2] BFDHFSHZJLFAMC-UHFFFAOYSA-L 0.000 claims description 3
- UGZADUVQMDAIAO-UHFFFAOYSA-L zinc hydroxide Chemical compound [OH-].[OH-].[Zn+2] UGZADUVQMDAIAO-UHFFFAOYSA-L 0.000 claims description 3
- 229940007718 zinc hydroxide Drugs 0.000 claims description 3
- 235000014413 iron hydroxide Nutrition 0.000 claims 1
- NCNCGGDMXMBVIA-UHFFFAOYSA-L iron(ii) hydroxide Chemical compound [OH-].[OH-].[Fe+2] NCNCGGDMXMBVIA-UHFFFAOYSA-L 0.000 claims 1
- 239000011149 active material Substances 0.000 abstract description 43
- 238000000034 method Methods 0.000 abstract description 26
- 230000007797 corrosion Effects 0.000 abstract description 20
- 238000005260 corrosion Methods 0.000 abstract description 20
- 239000002253 acid Substances 0.000 description 22
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 20
- 239000000463 material Substances 0.000 description 20
- 229910052799 carbon Inorganic materials 0.000 description 15
- 239000006261 foam material Substances 0.000 description 14
- 230000008569 process Effects 0.000 description 12
- 239000004020 conductor Substances 0.000 description 11
- YADSGOSSYOOKMP-UHFFFAOYSA-N dioxolead Chemical compound O=[Pb]=O YADSGOSSYOOKMP-UHFFFAOYSA-N 0.000 description 11
- 229910052759 nickel Inorganic materials 0.000 description 11
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 8
- 229910052751 metal Inorganic materials 0.000 description 8
- 239000002184 metal Substances 0.000 description 8
- 239000008151 electrolyte solution Substances 0.000 description 7
- 239000000203 mixture Substances 0.000 description 7
- 239000011159 matrix material Substances 0.000 description 6
- 238000010438 heat treatment Methods 0.000 description 5
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- 241000894007 species Species 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 4
- 238000000576 coating method Methods 0.000 description 4
- 238000009760 electrical discharge machining Methods 0.000 description 4
- QELJHCBNGDEXLD-UHFFFAOYSA-N nickel zinc Chemical compound [Ni].[Zn] QELJHCBNGDEXLD-UHFFFAOYSA-N 0.000 description 4
- 230000035939 shock Effects 0.000 description 4
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 3
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 3
- 239000003575 carbonaceous material Substances 0.000 description 3
- 238000007599 discharging Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 229910052709 silver Inorganic materials 0.000 description 3
- 239000004332 silver Substances 0.000 description 3
- 239000007921 spray Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 229910001030 Iron–nickel alloy Inorganic materials 0.000 description 2
- 238000003763 carbonization Methods 0.000 description 2
- 238000010000 carbonizing Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
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- 239000008367 deionised water Substances 0.000 description 2
- 239000003792 electrolyte Substances 0.000 description 2
- UGKDIUIOSMUOAW-UHFFFAOYSA-N iron nickel Chemical compound [Fe].[Ni] UGKDIUIOSMUOAW-UHFFFAOYSA-N 0.000 description 2
- HDMKAUUMGFGBRJ-UHFFFAOYSA-N iron;dihydrate Chemical compound O.O.[Fe] HDMKAUUMGFGBRJ-UHFFFAOYSA-N 0.000 description 2
- HTUMBQDCCIXGCV-UHFFFAOYSA-N lead oxide Chemical compound [O-2].[Pb+2] HTUMBQDCCIXGCV-UHFFFAOYSA-N 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910052987 metal hydride Inorganic materials 0.000 description 2
- -1 nickel metal hydride Chemical class 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 241000233788 Arecaceae Species 0.000 description 1
- 241000723418 Carya Species 0.000 description 1
- 239000004606 Fillers/Extenders Substances 0.000 description 1
- 241000013479 Guibourtia coleosperma Species 0.000 description 1
- 244000227633 Ocotea pretiosa Species 0.000 description 1
- 235000004263 Ocotea pretiosa Nutrition 0.000 description 1
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- 150000007513 acids Chemical class 0.000 description 1
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- OJIJEKBXJYRIBZ-UHFFFAOYSA-N cadmium nickel Chemical compound [Ni].[Cd] OJIJEKBXJYRIBZ-UHFFFAOYSA-N 0.000 description 1
- 125000004432 carbon atom Chemical group C* 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
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- 239000012153 distilled water Substances 0.000 description 1
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- 239000011121 hardwood Substances 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- PIJPYDMVFNTHIP-UHFFFAOYSA-L lead sulfate Chemical compound [PbH4+2].[O-]S([O-])(=O)=O PIJPYDMVFNTHIP-UHFFFAOYSA-L 0.000 description 1
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Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/64—Carriers or collectors
- H01M4/66—Selection of materials
- H01M4/663—Selection of materials containing carbon or carbonaceous materials as conductive part, e.g. graphite, carbon fibres
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/14—Electrodes for lead-acid accumulators
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/14—Electrodes for lead-acid accumulators
- H01M4/16—Processes of manufacture
- H01M4/20—Processes of manufacture of pasted electrodes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/64—Carriers or collectors
- H01M4/70—Carriers or collectors characterised by shape or form
- H01M4/80—Porous plates, e.g. sintered carriers
- H01M4/808—Foamed, spongy materials
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/06—Lead-acid accumulators
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/24—Alkaline accumulators
- H01M10/30—Nickel accumulators
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Definitions
- This invention relates generally to current collectors for a battery and, more particularly, to carbon foam current collectors for a battery.
- Electrochemical batteries including, for example, lead acid and nickel-based batteries, among others, are known to include at least one positive current collector, at least one negative current collector, and an electrolytic solution.
- lead acid batteries for example, both the positive and negative current collectors are constructed from lead.
- the role of these lead current collectors is to transfer electric current to and from the battery terminals during the discharge and charging processes. Storage and release of electrical energy in lead acid batteries is enabled by chemical reactions that occur in a paste disposed on the current collectors.
- the positive and negative current collectors, once coated with this paste, are referred to as positive and negative plates, respectively.
- a notable limitation on the durability of lead-acid batteries is corrosion of the lead current collector of the positive plate.
- the rate of corrosion of the lead current collector is a major factor in determining the life of the lead acid battery.
- the electrolyte e.g., sulfuric acid
- the current collector of each positive plate is continually subjected to corrosion due to its exposure to sulfuric acid and to the anodic potentials of the positive plate.
- One of the most damaging effects of this corrosion of the positive plate current collector is volume expansion.
- lead dioxide is formed from the lead source metal of the current collector.
- this lead dioxide corrosion product has a greater volume than the lead source material consumed to create the lead dioxide. Corrosion of the lead source material and the ensuing increase in volume of the lead dioxide corrosion product is known as volume expansion.
- volume expansion induces mechanical stresses on the current collector that deform and stretch the current collector. At a total volume increase of the current collector of approximately 4% to 7%, the current collector may fracture. As a result, battery capacity may drop, and eventually, the battery will reach the end of its service life. Additionally, at advanced stages of corrosion, internal shorting within the current collector and rupture of the cell case may occur. Both of these corrosion effects may lead to failure of one or more of the cells within the battery.
- One method of extending the service life of a lead acid battery is to increase the corrosion resistance of the current collector of the positive plate.
- Several methods have been proposed for inhibiting the corrosion process in lead acid batteries. Because carbon does not oxidize at the temperatures at which lead-acid batteries generally operate, some of these methods have involved using carbon in various forms to slow or prevent the detrimental corrosion process in lead acid batteries.
- U.S. Pat. No. 5,512,390 discloses a lead acid battery that includes current collectors made from graphite plates instead of lead. The graphite plates have sufficient conductivity to function as current collectors, and they are more corrosion resistant than lead. Substituting graphite plates for the lead current collectors may, therefore, lengthen the life of a lead-acid battery.
- the battery of the '390 patent may potentially offer a lengthened service life as a result of reduced corrosion at the positive plate
- the graphite plates of the '390 patent are problematic.
- the graphite plates of the '390 patent are dense, flat sheets of material each having a relatively small amount of surface area.
- the graphite plates of the '390 patent are smooth sheets with no patterning.
- an increase in surface area of the current collector may increase the specific energy and power of the battery and, therefore, may translate into improved battery performance. More surface area on the current collectors may also lead to a reduction in the time required for charging and discharging of the battery.
- the relatively small surface area of the graphite plates of the '390 patent results in poorly performing batteries that have slow charging speeds.
- the graphite plates of the '390 patent lack the toughness of lead current collectors.
- the dense, graphite plates of the '390 patent are brittle and may fracture when subjected to physical shock or vibration. Such physical shock and vibration commonly occur in vehicular applications, for example. Any fracturing of the graphite plates would lead to the same problems caused by volume expansion of ordinary lead current collectors. Therefore, despite offering an increased resistance to corrosion compared to conventional lead current collectors, the brittle nature of the graphite plates of the '390 patent could actually result in battery service lives shorter than those possible through use of ordinary lead current collectors.
- the present invention is directed to overcoming one or more of the problems or disadvantages existing in the prior art.
- One embodiment of the present invention includes an electrode plate for a battery.
- the electrode plate includes a carbon foam current collector that has a network of pores.
- a chemically active material is disposed on the carbon foam current collector such that the chemically active material penetrates into the network of pores.
- a second embodiment of the present invention includes a method of making an electrode plate for a battery. This method includes forming a current collector from carbon foam.
- the carbon foam current collector includes a protruding tab and a network of pores.
- An electrical connection may be formed at the protruding tab of the current collector.
- the method also includes applying a chemically active material to the current collector such that the chemically active material penetrates the network of pores in the carbon foam.
- a third embodiment of the present invention includes a method of making an electrode plate for a battery.
- the method includes supplying a wood substrate and carbonizing the wood substrate to form a carbonized wood current collector. Chemically active material may be disposed on the carbonized wood current collector.
- a fourth embodiment of the present invention includes a.
- This battery includes a housing, and positive and negative terminals. Within the housing is at least one cell that includes at least one positive plate and at least one negative plate connected to the positive terminal and negative terminal, respectively.
- An electrolytic solution fills a volume between the positive and negative plates.
- the at least one positive plate includes a carbon foam current collector including a network of pores, and a chemically active material disposed on the carbon foam current collector such that the chemically active paste penetrates the network of pores.
- FIG. 1 is a diagrammatic cut-away representation of a battery in accordance with an exemplary embodiment of the present invention
- FIGS. 2A and 2B are photographs of a current collector in accordance with an exemplary embodiment of the present invention.
- FIG. 3 is a photograph of the porous structure of a carbon foam current collector, at about 10 ⁇ magnification, in accordance with an exemplary embodiment of the present invention.
- FIG. 4 is a diagrammatic, close-up representation of the porous structure of a carbon foam current collector in accordance with an exemplary embodiment of the present invention.
- FIG. 1 illustrates a battery 10 in accordance with an exemplary embodiment of the present invention.
- Battery 10 includes a housing 11 and terminals 12 , which are external to housing 11 .
- At least one cell 13 is disposed within housing 11 . While only one cell 13 is necessary, multiple cells may be connected in series or in parallel to provide a desired total potential of battery 10 .
- Each cell 13 may be composed of alternating positive and negative plates immersed in an electrolytic solution.
- the electrolytic solution composition may be chosen to correspond with a particular battery chemistry.
- lead acid batteries may include an electrolytic solution of sulfuric acid and distilled water
- nickel-based batteries may include alkaline electrolyte solutions that include a base, such as potassium hydroxide, mixed with water. It should be noted that other acids and other bases may be used to form the electrolytic solutions of the disclosed batteries.
- the positive and negative plates of each cell 13 may include a current collector packed or coated with a chemically active material.
- the composition of the chemically active material may depend on the chemistry of battery 10 .
- lead acid batteries may include a chemically active material including, for example, an oxide or salt of lead.
- the anode plates (i.e., positive plates) of nickel cadmium (NiCd) batteries may include cadmium hydroxide (Cd(OH) 2 ) material; nickel metal hydride batteries may include lanthanum nickel (LaNi 5 ) material; nickel zinc (NiZn) batteries may include zinc hydroxide (Zn(OH) 2 ) material; and nickel iron (NiFe) batteries may include iron hydroxide (Fe(OH) 2 ) material.
- the chemically active material on the cathode (i.e., negative) plate may be nickel hydroxide.
- FIG. 2A illustrates a current collector 20 according to an exemplary embodiment of the present invention.
- Current collector 20 includes a thin, rectangular body and a tab 21 used to form an electrical connection with current collector 20 .
- the current collector shown in FIG. 2A may be used to form either a positive or a negative plate.
- chemical reactions in the active material disposed on the current collectors of the battery enable storage and release of energy.
- the composition of this active material, and not the current collector material determines whether a given current collector functions as either a positive or a negative plate.
- the current collector material and configuration affects the characteristics and performance of battery 10 .
- each current collector 20 transfers the resulting electric current to and from battery terminals 12 .
- current collector 20 In order to efficiently transfer current to and from terminals 12 , current collector 20 must be formed from a conductive material. Further, the susceptibility of the current collector material to corrosion will affect not only the performance of battery 10 , but it will also impact the service life of battery 10 .
- the configuration of current collector 20 is also important to battery performance. For instance, the amount of surface area available on current collector 20 may influence the specific energy, specific power, and the charge/discharge rates of battery 10 .
- current collector 20 is formed from of a carbon foam material, which may include carbon or carbon-based materials that exhibit some degree of porosity. Because the foam is carbon, it can resist corrosion even when exposed to electrolytes and to the electrical potentials of the positive or negative plates.
- the carbon foam includes a network of pores, which provides a large amount of surface area for each current collector 20 .
- Current collectors composed of carbon foam may exhibit more than 2000 times the amount of surface area provided by conventional current collectors.
- the disclosed foam material may include any carbon-based material having a reticulated pattern including a three-dimensional network of struts and pores.
- the foam may comprise either or both of naturally occurring and artificially derived materials.
- FIG. 2B illustrates a closer view of tab 21 , which optionally may be formed on current collector 20 .
- Tab 21 may be coated with a conductive material and used to form an electrical connection with the current collector 20 .
- the conductive material used to coat tab 21 may include a metal that is more conductive than the carbon foam current collector. Coating tab 21 with a conductive material may provide structural support for tab 21 and create a suitable electrical connection capable of handling the high currents present in a lead acid and nickel-based batteries.
- FIG. 3 provides a view, at approximately 10 ⁇ magnification, of an exemplary current collector 20 , including the network of pores.
- FIG. 4 provides an even more detailed representation (approximately 100 ⁇ magnification) of the network of pores.
- the carbon foam may include from about 4 to about 50 pores per centimeter and an average pore size of at least about 200 ⁇ m. In other embodiments, however, the average pore size may be smaller. For example, in certain embodiments, the average pore size may be at least about 20 ⁇ m. In still other embodiments, the average pore size may be at least about 40 ⁇ m. While reducing the average pore size of the carbon foam material may have the effect of increasing the effective surface area of the material, average pore sizes below 20 ⁇ m may impede or prevent penetration of the chemically active material into pores of the carbon foam material.
- a total porosity value for the carbon foam may be at least 60%. In other words, at least 60% of the volume of the carbon foam structure may be included within pores 41 . Carbon foam materials may also have total porosity values less than 60%. For example, in certain embodiments, the carbon foam may have a total porosity value of at least 30%.
- the carbon foam may have an open porosity value of at least 90%. Therefore, at least 90% of pores 41 are open to adjacent pores such that the network of pores 41 forms a substantially open network. This open network of pores 41 may allow the active material deposited on each current collector 20 to penetrate within the carbon foam structure.
- the carbon foam includes a web of structural elements 42 that provide support for the carbon foam. In total, the network of pores 41 and the structural elements 42 of the carbon foam may result in a density of less than about 0.6 gm/cm3 for the carbon foam material.
- the carbon foam of the present invention Due to the high conductivity of the carbon foam of the present invention, current collectors 20 can efficiently transfer current to and from the battery terminals 12 , or any other conductive elements providing access to the electrical potential of battery 10 .
- the carbon foam may offer sheet resistivity values of less than about 1 ohm-cm. In still other forms, the carbon foam may have sheet resistivity values of less than about 0.75 ohm-cm.
- graphite foam may also be Used to form current collector 20 .
- One such graphite foam under the trade name PocoFoamTM, is available from Poco Graphite, Inc.
- the density and pore structure of graphite foam may be similar to carbon foam.
- a primary difference between graphite foam and carbon foam is the orientation of the carbon atoms that make up the structural elements 42 .
- the carbon in carbon foam, the carbon may be at least partially amorphous.
- graphite foam much of the carbon is ordered into a graphite, layered structure. Because of the ordered nature of the graphite structure, graphite foam may offer higher conductivity than carbon foam.
- Graphite foam may exhibit electrical resistivity values of between about 100 ⁇ -cm and about 2500 ⁇ -cm.
- the carbon and graphite foams of the present invention may also be obtained by subjecting various organic materials to a carbonizing and/or graphitizing process.
- various wood species may be carbonized and/or graphitized to yield the carbon foam material for current collector 20 .
- Wood includes a natural occurring network of pores. These pores may be elongated and linearly oriented. Moreover, as a result of their water-carrying properties, the pores in wood form a substantially open structure. Certain wood species may offer an open porosity value of at least about 90%.
- the average pore size of wood may vary among different wood species, but in an exemplary embodiment of the invention, the wood used to form the carbon foam material has an average pore size of at least about 20 microns.
- wood may be used to form the carbon foam of the invention.
- most hardwoods have pore structures suitable for use in the carbon foam current collectors of the invention.
- Exemplary wood species that may be used to create the carbon foam include oak, mahogony, teak, hickory, elm, sassafras, bubinga, palms, and many other types of wood.
- the wood selected for use in creating the carbon foam may originate from tropical growing areas. For example, unlike wood grown in climates with significant seasonal variation, wood from tropical regions may have a less defined growth ring structure. As a result, the porous network of wood from tropical areas may lack certain non-uniformities that can result from the presence of growth rings.
- wood may be subjected to a carbonization process to create carbonized wood (e.g., a carbon foam material).
- a carbonization process to create carbonized wood (e.g., a carbon foam material).
- heating of the wood to a temperature of between about 800° C. and about 1400° C. may have the effect of expelling volatile components from the wood.
- the wood may be maintained in this temperature range for a time sufficient to convert at least a portion of the wood to a carbon matrix.
- This carbonized wood will include the original porous structure of the wood. As a result of its carbon matrix, however, the carbonized wood can be electrically conductive and resistant to corrosion.
- the wood may be heated and cooled at any desired rate. In one embodiment, however, the wood may be heated and cooled sufficiently slowly to minimize or prevent cracking of the wood/carbonized wood. Also, heating of the wood may occur in an inert environment.
- the carbonized wood may be used to form current collectors 20 without additional processing.
- the carbonized wood may be subjected to a graphitization process to create graphitized wood (e.g., a graphite foam material).
- graphitized wood is carbonized wood in which at least a portion of the carbon matrix has been converted to a graphite matrix.
- the graphite structure may exhibit increased electrical conductivity as compared to non-graphite carbon structures.
- Graphitizing the carbonized wood may be accomplished by heating the carbonized wood to a temperature of between about 2400° C. and about 3000° C. for a time sufficient to convert at least a portion of the carbon matrix of the carbonized wood to a graphite matrix. Heating and cooling of the carbonized wood may proceed at any desired rate. In one embodiment, however, the carbonized wood may be heated and cooled sufficiently slowly to minimize or prevent cracking. Also, heating of the carbonized wood may occur in an inert environment.
- current collector 20 may be made from either carbon foam or from graphite foam.
- either the current collector of the positive plate or the current collector of the negative plate may be formed of a material other than carbon or graphite foam.
- the current collector of the negative plate may be made of lead or another suitable conductive material.
- the current collector of the positive plate may be formed of a conductive material other than carbon or graphite foam.
- the process for making an electrode plate for a battery can begin by forming current collector 20 .
- the carbon foam material used to form current collector 20 may be fabricated or acquired in the desired dimensions of current collector 20 .
- the carbon foam material may be fabricated or acquired in bulk form and subsequently machined to form the current collectors.
- wire EDM electrical discharge machining
- conductive materials are cut with a thin wire surrounded by de-ionized water. There is no physical contact between the wire and the part being machined. Rather, the wire is rapidly charged to a predetermined voltage, which causes a spark to bridge a gap between the wire and the work piece. As a result, a small portion of the work piece melts. The de-ionized water then cools and flushes away the small particles of the melted work piece. Because no cutting forces are generated by wire EDM, the carbon foam may be machined without causing the network of pores 41 to collapse. By preserving pores 41 on the surface of the current collector, chemically active materials may penetrate more easily into current collector 20 .
- current collector 20 may include tab 21 used to form an electrical connection to current collector 20 .
- the electrical connection of current collector 20 may be required to carry currents of up to about 100 amps or even greater.
- the carbon foam that forms tab 21 may be pre-treated by a method that causes a conductive material, such as a metal, to wet the carbon foam.
- a conductive material such as a metal
- thermal spray may offer the added benefit of enabling the conductive metal to penetrate deeper into the porous network of the carbon foam.
- silver may be applied to tab 21 by thermal spray to form a carbon-metal interface.
- other conductive materials may be used to form the carbon-metal interface depending on a particular application.
- a second conductive material may be added to the tab 21 to complete the electrical connection.
- a metal such as lead may be applied to tab 21 .
- lead wets the silver-treated carbon foam in a manner that allows enough lead to be deposited on tab 21 to form a suitable electrical connection.
- a chemically active material in the form of a paste or a slurry, for example, may be applied to current collector 20 such that the active material penetrates the network of pores in the carbon foam. It should be noted that the chemically active material may penetrate one, some, or all of the pores in the carbon foam.
- One exemplary method for applying a chemically active material to current collector 20 includes spreading a paste onto a transfer sheet, folding the transfer sheet including the paste over the current collector 20 , and applying pressure to the transfer sheet to force the chemically active paste into pores 41 . Pressure for forcing the paste into pores 41 may be applied by a roller, mechanical press, or other suitable device.
- Still another method for applying a chemically active material to current collector 20 may include dipping, painting, or otherwise coating current collector 20 with a slurry of active material. This slurry may flow into pores 41 to coat internal and external surfaces of current collector 20 .
- the composition of the chemically active material used on current collectors 20 depends on the chemistry of battery 10 .
- the chemically active material that is applied to the current collectors 20 of both the positive and negative plates may be substantially the same in terms of chemical composition.
- this material may include lead oxide (PbO).
- Other oxides and salts of lead may also be suitable.
- the chemically active material may also include various additives including, for example, varying percentages of free lead, structural fibers, conductive materials, carbon, and extenders to accommodate volume changes over the life of the battery.
- the constituents of the chemically active material for lead acid batteries may be mixed with sulfuric acid and water to form a paste, slurry, or any other type of coating material that may be disposed within pores 41 of current collector 20 .
- the chemically active material used on current collectors of nickel-based batteries may include various compositions depending on the type of battery and whether the material is to be used on a positive or negative plate.
- the positive plates may include a cadmium hydroxide (Cd(OH) 2 ) active material in NiCd batteries, a lanthanum nickel (LaNi 5 ) active material in nickel metal hydride batteries, a zinc hydroxide (Zn(OH) 2 ) active material in nickel zinc (NiZn) batteries, and an iron hydroxide (Fe(OH) 2 ) active material in nickel iron (NiFe) batteries.
- the chemically active material disposed on the negative plate may be nickel hydroxide.
- the chemically active material may be applied to the current collectors as, for example, a slurry, a paste, or any other appropriate coating material.
- depositing the chemically active material on the current collectors 20 forms the positive and negative plates of the battery.
- the chemically active material deposited on current collectors 20 may be subjected to curing and/or drying processes.
- a curing process may include exposing the chemically active materials to elevated temperature and/or humidity to encourage a change in the chemical and/or physical properties of the chemically active material.
- battery 10 After assembling together the positive and negative plates to form the cells of battery 10 (shown in FIG. 1 ), battery 10 may be subjected to a charging (i.e., formation) process.
- the composition of the chemically active materials may change to a state that provides an electrochemical potential between the positive and negative plates of the cells.
- the PbO active material of the positive plate may be electrically driven to lead dioxide (PbO2), and the active material of the negative plate may be converted to sponge lead.
- PbO2 lead dioxide
- the chemically active materials of both the positive and negative plates convert toward lead sulfate.
- Analogous chemical dynamics are associated with the charging and discharging of other battery chemistries, including nickel-based batteries, for example.
- batteries consistent with the present invention may offer significantly longer service lives.
- the large amount of surface area associated with the carbon foam or graphite foam materials forming current collectors 20 may translate into batteries having both large specific power and specific energy values.
- the chemically active material of the positive and negative plates is intimately integrated with the current collectors 20 .
- the reaction sites in the chemically active paste are close to one or more conductive, carbon foam structural elements 42 . Therefore, electrons produced in the chemically active material at a particular reaction site must travel only a short distance through the paste before encountering one of the many highly conductive structural elements 42 of current collector 20 .
- batteries with carbon foam current collectors 20 may offer both improved specific power and specific energy values. In other words, these batteries, when placed under a load, may sustain their voltage above a predetermined threshold value for a longer time than batteries including traditional current collectors made of lead, graphite plates, etc.
- the disclosed batteries may be suitable for applications in which charging energy is available for only a limited amount of time. For instance, in vehicles, a great deal of energy is lost during ordinary braking. This braking energy may be recaptured and used to charge a battery of, for example, a hybrid vehicle. The braking energy, however, is available only for a short period of time (i.e., while braking is occurring). Thus, any transfer of braking energy to a battery must occur during braking. In view of their reduced charging times, the batteries of the present invention may provide an efficient means for storing such braking energy.
- the disclosed carbon foam current collectors may be pliable, and therefore, they may be less susceptible to damage from vibration or shock as compared to current collectors made from graphite plates or other brittle materials. Batteries including carbon foam current collectors may perform well in vehicular applications, or other applications, where vibration and shock are common.
- the battery of the present invention may weigh substantially less that batteries including either lead current collectors or graphite plate current collectors.
Abstract
Description
- This application is a continuation-in-part of U.S. application Ser. No. 10/183,471 filed on Jun. 28, 2002, which is incorporated herein by reference.
- This invention relates generally to current collectors for a battery and, more particularly, to carbon foam current collectors for a battery.
- Electrochemical batteries, including, for example, lead acid and nickel-based batteries, among others, are known to include at least one positive current collector, at least one negative current collector, and an electrolytic solution. In lead acid batteries, for example, both the positive and negative current collectors are constructed from lead. The role of these lead current collectors is to transfer electric current to and from the battery terminals during the discharge and charging processes. Storage and release of electrical energy in lead acid batteries is enabled by chemical reactions that occur in a paste disposed on the current collectors. The positive and negative current collectors, once coated with this paste, are referred to as positive and negative plates, respectively. A notable limitation on the durability of lead-acid batteries is corrosion of the lead current collector of the positive plate.
- The rate of corrosion of the lead current collector is a major factor in determining the life of the lead acid battery. Once the electrolyte (e.g., sulfuric acid) is added to the battery and the battery is charged, the current collector of each positive plate is continually subjected to corrosion due to its exposure to sulfuric acid and to the anodic potentials of the positive plate. One of the most damaging effects of this corrosion of the positive plate current collector is volume expansion. Particularly, as the lead current collector corrodes, lead dioxide is formed from the lead source metal of the current collector. Moreover, this lead dioxide corrosion product has a greater volume than the lead source material consumed to create the lead dioxide. Corrosion of the lead source material and the ensuing increase in volume of the lead dioxide corrosion product is known as volume expansion.
- Volume expansion induces mechanical stresses on the current collector that deform and stretch the current collector. At a total volume increase of the current collector of approximately 4% to 7%, the current collector may fracture. As a result, battery capacity may drop, and eventually, the battery will reach the end of its service life. Additionally, at advanced stages of corrosion, internal shorting within the current collector and rupture of the cell case may occur. Both of these corrosion effects may lead to failure of one or more of the cells within the battery.
- One method of extending the service life of a lead acid battery is to increase the corrosion resistance of the current collector of the positive plate. Several methods have been proposed for inhibiting the corrosion process in lead acid batteries. Because carbon does not oxidize at the temperatures at which lead-acid batteries generally operate, some of these methods have involved using carbon in various forms to slow or prevent the detrimental corrosion process in lead acid batteries. For example, U.S. Pat. No. 5,512,390 (hereinafter the '390 patent) discloses a lead acid battery that includes current collectors made from graphite plates instead of lead. The graphite plates have sufficient conductivity to function as current collectors, and they are more corrosion resistant than lead. Substituting graphite plates for the lead current collectors may, therefore, lengthen the life of a lead-acid battery.
- While the battery of the '390 patent may potentially offer a lengthened service life as a result of reduced corrosion at the positive plate, the graphite plates of the '390 patent are problematic. For example, the graphite plates of the '390 patent are dense, flat sheets of material each having a relatively small amount of surface area. Unlike lead electrode plates of a conventional lead-acid battery, which are generally patterned into a grid-like structure to increase the available surface area of the plates, the graphite plates of the '390 patent are smooth sheets with no patterning. In lead acid batteries, an increase in surface area of the current collector may increase the specific energy and power of the battery and, therefore, may translate into improved battery performance. More surface area on the current collectors may also lead to a reduction in the time required for charging and discharging of the battery. The relatively small surface area of the graphite plates of the '390 patent results in poorly performing batteries that have slow charging speeds.
- Additionally, the graphite plates of the '390 patent lack the toughness of lead current collectors. The dense, graphite plates of the '390 patent are brittle and may fracture when subjected to physical shock or vibration. Such physical shock and vibration commonly occur in vehicular applications, for example. Any fracturing of the graphite plates would lead to the same problems caused by volume expansion of ordinary lead current collectors. Therefore, despite offering an increased resistance to corrosion compared to conventional lead current collectors, the brittle nature of the graphite plates of the '390 patent could actually result in battery service lives shorter than those possible through use of ordinary lead current collectors.
- The present invention is directed to overcoming one or more of the problems or disadvantages existing in the prior art.
- One embodiment of the present invention includes an electrode plate for a battery. The electrode plate includes a carbon foam current collector that has a network of pores. A chemically active material is disposed on the carbon foam current collector such that the chemically active material penetrates into the network of pores.
- A second embodiment of the present invention includes a method of making an electrode plate for a battery. This method includes forming a current collector from carbon foam. The carbon foam current collector includes a protruding tab and a network of pores. An electrical connection may be formed at the protruding tab of the current collector. The method also includes applying a chemically active material to the current collector such that the chemically active material penetrates the network of pores in the carbon foam.
- A third embodiment of the present invention includes a method of making an electrode plate for a battery. The method includes supplying a wood substrate and carbonizing the wood substrate to form a carbonized wood current collector. Chemically active material may be disposed on the carbonized wood current collector. A fourth embodiment of the present invention includes a. This battery includes a housing, and positive and negative terminals. Within the housing is at least one cell that includes at least one positive plate and at least one negative plate connected to the positive terminal and negative terminal, respectively. An electrolytic solution fills a volume between the positive and negative plates. The at least one positive plate includes a carbon foam current collector including a network of pores, and a chemically active material disposed on the carbon foam current collector such that the chemically active paste penetrates the network of pores.
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FIG. 1 is a diagrammatic cut-away representation of a battery in accordance with an exemplary embodiment of the present invention; -
FIGS. 2A and 2B are photographs of a current collector in accordance with an exemplary embodiment of the present invention; -
FIG. 3 is a photograph of the porous structure of a carbon foam current collector, at about 10× magnification, in accordance with an exemplary embodiment of the present invention; and -
FIG. 4 is a diagrammatic, close-up representation of the porous structure of a carbon foam current collector in accordance with an exemplary embodiment of the present invention. -
FIG. 1 illustrates abattery 10 in accordance with an exemplary embodiment of the present invention.Battery 10 includes ahousing 11 andterminals 12, which are external tohousing 11. At least onecell 13 is disposed withinhousing 11. While only onecell 13 is necessary, multiple cells may be connected in series or in parallel to provide a desired total potential ofbattery 10. - Each
cell 13 may be composed of alternating positive and negative plates immersed in an electrolytic solution. The electrolytic solution composition may be chosen to correspond with a particular battery chemistry. For example., while lead acid batteries may include an electrolytic solution of sulfuric acid and distilled water, nickel-based batteries may include alkaline electrolyte solutions that include a base, such as potassium hydroxide, mixed with water. It should be noted that other acids and other bases may be used to form the electrolytic solutions of the disclosed batteries. - The positive and negative plates of each
cell 13 may include a current collector packed or coated with a chemically active material. The composition of the chemically active material may depend on the chemistry ofbattery 10. For example, lead acid batteries may include a chemically active material including, for example, an oxide or salt of lead. Further, the anode plates (i.e., positive plates) of nickel cadmium (NiCd) batteries may include cadmium hydroxide (Cd(OH)2) material; nickel metal hydride batteries may include lanthanum nickel (LaNi5) material; nickel zinc (NiZn) batteries may include zinc hydroxide (Zn(OH)2) material; and nickel iron (NiFe) batteries may include iron hydroxide (Fe(OH)2) material. In all of the nickel-based batteries, the chemically active material on the cathode (i.e., negative) plate may be nickel hydroxide. -
FIG. 2A illustrates acurrent collector 20 according to an exemplary embodiment of the present invention.Current collector 20 includes a thin, rectangular body and atab 21 used to form an electrical connection withcurrent collector 20. - The current collector shown in
FIG. 2A may be used to form either a positive or a negative plate. As previously stated, chemical reactions in the active material disposed on the current collectors of the battery enable storage and release of energy. The composition of this active material, and not the current collector material, determines whether a given current collector functions as either a positive or a negative plate. - While the type of plate, whether positive or negative, does not depend on the material selected for
current collector 20, the current collector material and configuration affects the characteristics and performance ofbattery 10. For example, during the charging and discharging processes, eachcurrent collector 20 transfers the resulting electric current to and frombattery terminals 12. In order to efficiently transfer current to and fromterminals 12,current collector 20 must be formed from a conductive material. Further, the susceptibility of the current collector material to corrosion will affect not only the performance ofbattery 10, but it will also impact the service life ofbattery 10. In addition to the material selected for thecurrent collector 20, the configuration ofcurrent collector 20 is also important to battery performance. For instance, the amount of surface area available oncurrent collector 20 may influence the specific energy, specific power, and the charge/discharge rates ofbattery 10. - In an exemplary embodiment of the present invention,
current collector 20, as shown inFIG. 2A , is formed from of a carbon foam material, which may include carbon or carbon-based materials that exhibit some degree of porosity. Because the foam is carbon, it can resist corrosion even when exposed to electrolytes and to the electrical potentials of the positive or negative plates. The carbon foam includes a network of pores, which provides a large amount of surface area for eachcurrent collector 20. Current collectors composed of carbon foam may exhibit more than 2000 times the amount of surface area provided by conventional current collectors. - The disclosed foam material may include any carbon-based material having a reticulated pattern including a three-dimensional network of struts and pores. The foam may comprise either or both of naturally occurring and artificially derived materials.
-
FIG. 2B illustrates a closer view oftab 21, which optionally may be formed oncurrent collector 20.Tab 21 may be coated with a conductive material and used to form an electrical connection with thecurrent collector 20. In addition totab 21, other suitable configurations for establishing electrical connections withcurrent collector 20 may be used. The conductive material used tocoat tab 21 may include a metal that is more conductive than the carbon foam current collector.Coating tab 21 with a conductive material may provide structural support fortab 21 and create a suitable electrical connection capable of handling the high currents present in a lead acid and nickel-based batteries. -
FIG. 3 provides a view, at approximately 10× magnification, of an exemplarycurrent collector 20, including the network of pores.FIG. 4 provides an even more detailed representation (approximately 100× magnification) of the network of pores. In one embodiment, the carbon foam may include from about 4 to about 50 pores per centimeter and an average pore size of at least about 200 μm. In other embodiments, however, the average pore size may be smaller. For example, in certain embodiments, the average pore size may be at least about 20 μm. In still other embodiments, the average pore size may be at least about 40 μm. While reducing the average pore size of the carbon foam material may have the effect of increasing the effective surface area of the material, average pore sizes below 20 μm may impede or prevent penetration of the chemically active material into pores of the carbon foam material. - Regardless of the average pore size, a total porosity value for the carbon foam may be at least 60%. In other words, at least 60% of the volume of the carbon foam structure may be included within pores 41. Carbon foam materials may also have total porosity values less than 60%. For example, in certain embodiments, the carbon foam may have a total porosity value of at least 30%.
- Moreover, the carbon foam may have an open porosity value of at least 90%. Therefore, at least 90% of
pores 41 are open to adjacent pores such that the network ofpores 41 forms a substantially open network. This open network ofpores 41 may allow the active material deposited on eachcurrent collector 20 to penetrate within the carbon foam structure. In addition to the network ofpores 41, the carbon foam includes a web ofstructural elements 42 that provide support for the carbon foam. In total, the network ofpores 41 and thestructural elements 42 of the carbon foam may result in a density of less than about 0.6 gm/cm3 for the carbon foam material. - Due to the high conductivity of the carbon foam of the present invention,
current collectors 20 can efficiently transfer current to and from thebattery terminals 12, or any other conductive elements providing access to the electrical potential ofbattery 10. In certain forms, the carbon foam may offer sheet resistivity values of less than about 1 ohm-cm. In still other forms, the carbon foam may have sheet resistivity values of less than about 0.75 ohm-cm. - In addition to carbon foam, graphite foam may also be Used to form
current collector 20. One such graphite foam, under the trade name PocoFoam™, is available from Poco Graphite, Inc. The density and pore structure of graphite foam may be similar to carbon foam. A primary difference between graphite foam and carbon foam is the orientation of the carbon atoms that make up thestructural elements 42. For example, in carbon foam, the carbon may be at least partially amorphous. In graphite foam, however, much of the carbon is ordered into a graphite, layered structure. Because of the ordered nature of the graphite structure, graphite foam may offer higher conductivity than carbon foam. Graphite foam may exhibit electrical resistivity values of between about 100 μΩ-cm and about 2500 μΩ-cm. - The carbon and graphite foams of the present invention may also be obtained by subjecting various organic materials to a carbonizing and/or graphitizing process. In one exemplary embodiment, various wood species may be carbonized and/or graphitized to yield the carbon foam material for
current collector 20. Wood includes a natural occurring network of pores. These pores may be elongated and linearly oriented. Moreover, as a result of their water-carrying properties, the pores in wood form a substantially open structure. Certain wood species may offer an open porosity value of at least about 90%. The average pore size of wood may vary among different wood species, but in an exemplary embodiment of the invention, the wood used to form the carbon foam material has an average pore size of at least about 20 microns. - Many species of wood may be used to form the carbon foam of the invention. As a general class, most hardwoods have pore structures suitable for use in the carbon foam current collectors of the invention. Exemplary wood species that may be used to create the carbon foam include oak, mahogony, teak, hickory, elm, sassafras, bubinga, palms, and many other types of wood. Optionally, the wood selected for use in creating the carbon foam may originate from tropical growing areas. For example, unlike wood grown in climates with significant seasonal variation, wood from tropical regions may have a less defined growth ring structure. As a result, the porous network of wood from tropical areas may lack certain non-uniformities that can result from the presence of growth rings.
- To provide the carbon foam, wood may be subjected to a carbonization process to create carbonized wood (e.g., a carbon foam material). For example, heating of the wood to a temperature of between about 800° C. and about 1400° C. may have the effect of expelling volatile components from the wood. The wood may be maintained in this temperature range for a time sufficient to convert at least a portion of the wood to a carbon matrix. This carbonized wood will include the original porous structure of the wood. As a result of its carbon matrix, however, the carbonized wood can be electrically conductive and resistant to corrosion. During the carbonization process, the wood may be heated and cooled at any desired rate. In one embodiment, however, the wood may be heated and cooled sufficiently slowly to minimize or prevent cracking of the wood/carbonized wood. Also, heating of the wood may occur in an inert environment.
- The carbonized wood may be used to form
current collectors 20 without additional processing. Optionally, however, the carbonized wood may be subjected to a graphitization process to create graphitized wood (e.g., a graphite foam material). Graphitized wood is carbonized wood in which at least a portion of the carbon matrix has been converted to a graphite matrix. As previously noted, the graphite structure may exhibit increased electrical conductivity as compared to non-graphite carbon structures. Graphitizing the carbonized wood may be accomplished by heating the carbonized wood to a temperature of between about 2400° C. and about 3000° C. for a time sufficient to convert at least a portion of the carbon matrix of the carbonized wood to a graphite matrix. Heating and cooling of the carbonized wood may proceed at any desired rate. In one embodiment, however, the carbonized wood may be heated and cooled sufficiently slowly to minimize or prevent cracking. Also, heating of the carbonized wood may occur in an inert environment. - In an exemplary embodiment of the present invention,
current collector 20 may be made from either carbon foam or from graphite foam. In certain battery chemistries, however, either the current collector of the positive plate or the current collector of the negative plate may be formed of a material other than carbon or graphite foam. For example, in lead acid batteries, the current collector of the negative plate may be made of lead or another suitable conductive material. In other battery chemistries (e.g., nickel-based batteries), the current collector of the positive plate may be formed of a conductive material other than carbon or graphite foam. - The process for making an electrode plate for a battery according to one embodiment of the present invention can begin by forming
current collector 20. In one embodiment of the invention, the carbon foam material used to formcurrent collector 20 may be fabricated or acquired in the desired dimensions ofcurrent collector 20. Alternatively, however, the carbon foam material may be fabricated or acquired in bulk form and subsequently machined to form the current collectors. - While any form of machining, such as, for example, band sawing and waterjet cutting, may be used to form the current collectors from the bulk carbon foam, wire EDM (electrical discharge machining) provides a method that may better preserve the open-cell structure of the carbon foam. In wire EDM, conductive materials are cut with a thin wire surrounded by de-ionized water. There is no physical contact between the wire and the part being machined. Rather, the wire is rapidly charged to a predetermined voltage, which causes a spark to bridge a gap between the wire and the work piece. As a result, a small portion of the work piece melts. The de-ionized water then cools and flushes away the small particles of the melted work piece. Because no cutting forces are generated by wire EDM, the carbon foam may be machined without causing the network of
pores 41 to collapse. By preserving pores 41 on the surface of the current collector, chemically active materials may penetrate more easily intocurrent collector 20. - As shown in
FIG. 2A ,current collector 20 may includetab 21 used to form an electrical connection tocurrent collector 20. In certain applications, the electrical connection ofcurrent collector 20 may be required to carry currents of up to about 100 amps or even greater. In order to form an appropriate electrical connection capable of carrying such currents, the carbon foam that formstab 21 may be pre-treated by a method that causes a conductive material, such as a metal, to wet the carbon foam. Such methods may include, for example, electroplating and thermal spray techniques. While both of these techniques may be suitable, thermal spray may offer the added benefit of enabling the conductive metal to penetrate deeper into the porous network of the carbon foam. In an exemplary embodiment of the present invention, silver may be applied totab 21 by thermal spray to form a carbon-metal interface. In addition to silver, other conductive materials may be used to form the carbon-metal interface depending on a particular application. - Once a carbon-metal interface has been established at
tab 21, a second conductive material may be added to thetab 21 to complete the electrical connection. For example, a metal such as lead may be applied totab 21. In an exemplary embodiment, lead wets the silver-treated carbon foam in a manner that allows enough lead to be deposited ontab 21 to form a suitable electrical connection. - A chemically active material, in the form of a paste or a slurry, for example, may be applied to
current collector 20 such that the active material penetrates the network of pores in the carbon foam. It should be noted that the chemically active material may penetrate one, some, or all of the pores in the carbon foam. One exemplary method for applying a chemically active material tocurrent collector 20 includes spreading a paste onto a transfer sheet, folding the transfer sheet including the paste over thecurrent collector 20, and applying pressure to the transfer sheet to force the chemically active paste into pores 41. Pressure for forcing the paste intopores 41 may be applied by a roller, mechanical press, or other suitable device. Still another method for applying a chemically active material tocurrent collector 20 may include dipping, painting, or otherwise coatingcurrent collector 20 with a slurry of active material. This slurry may flow intopores 41 to coat internal and external surfaces ofcurrent collector 20. - As noted above, the composition of the chemically active material used on
current collectors 20 depends on the chemistry ofbattery 10. For example, in lead acid batteries, the chemically active material that is applied to thecurrent collectors 20 of both the positive and negative plates may be substantially the same in terms of chemical composition. Specifically, this material may include lead oxide (PbO). Other oxides and salts of lead, however, may also be suitable. The chemically active material may also include various additives including, for example, varying percentages of free lead, structural fibers, conductive materials, carbon, and extenders to accommodate volume changes over the life of the battery. In certain embodiments, the constituents of the chemically active material for lead acid batteries may be mixed with sulfuric acid and water to form a paste, slurry, or any other type of coating material that may be disposed withinpores 41 ofcurrent collector 20. - The chemically active material used on current collectors of nickel-based batteries may include various compositions depending on the type of battery and whether the material is to be used on a positive or negative plate. For example, the positive plates may include a cadmium hydroxide (Cd(OH)2) active material in NiCd batteries, a lanthanum nickel (LaNi5) active material in nickel metal hydride batteries, a zinc hydroxide (Zn(OH)2) active material in nickel zinc (NiZn) batteries, and an iron hydroxide (Fe(OH)2) active material in nickel iron (NiFe) batteries. In all nickel-based batteries, the chemically active material disposed on the negative plate may be nickel hydroxide. For both the positive and negative plates in nickel-based batteries, the chemically active material may be applied to the current collectors as, for example, a slurry, a paste, or any other appropriate coating material.
- Independent of battery chemistry, depositing the chemically active material on the
current collectors 20 forms the positive and negative plates of the battery. While not necessary in all applications, in certain embodiments, the chemically active material deposited oncurrent collectors 20 may be subjected to curing and/or drying processes. For example, a curing process may include exposing the chemically active materials to elevated temperature and/or humidity to encourage a change in the chemical and/or physical properties of the chemically active material. - After assembling together the positive and negative plates to form the cells of battery 10 (shown in
FIG. 1 ),battery 10 may be subjected to a charging (i.e., formation) process. During this charging process, the composition of the chemically active materials may change to a state that provides an electrochemical potential between the positive and negative plates of the cells. For example, in a lead acid battery, the PbO active material of the positive plate may be electrically driven to lead dioxide (PbO2), and the active material of the negative plate may be converted to sponge lead. Conversely, during subsequent discharge of a lead acid battery, the chemically active materials of both the positive and negative plates convert toward lead sulfate. Analogous chemical dynamics are associated with the charging and discharging of other battery chemistries, including nickel-based batteries, for example. - By incorporating carbon into the electrode plates of the
battery 10, corrosion of the current collectors may be suppressed. As a result, batteries consistent with the present invention may offer significantly longer service lives. - Additionally, the large amount of surface area associated with the carbon foam or graphite foam materials forming
current collectors 20 may translate into batteries having both large specific power and specific energy values. Specifically, because of the open cell, porous network and relatively small pore size of the carbon foam materials, the chemically active material of the positive and negative plates is intimately integrated with thecurrent collectors 20. The reaction sites in the chemically active paste are close to one or more conductive, carbon foamstructural elements 42. Therefore, electrons produced in the chemically active material at a particular reaction site must travel only a short distance through the paste before encountering one of the many highly conductivestructural elements 42 ofcurrent collector 20. As a result, batteries with carbon foamcurrent collectors 20 may offer both improved specific power and specific energy values. In other words, these batteries, when placed under a load, may sustain their voltage above a predetermined threshold value for a longer time than batteries including traditional current collectors made of lead, graphite plates, etc. - The increased specific power values offered by batteries consistent with the present invention also may translate into reduced charging times. Therefore, the disclosed batteries may be suitable for applications in which charging energy is available for only a limited amount of time. For instance, in vehicles, a great deal of energy is lost during ordinary braking. This braking energy may be recaptured and used to charge a battery of, for example, a hybrid vehicle. The braking energy, however, is available only for a short period of time (i.e., while braking is occurring). Thus, any transfer of braking energy to a battery must occur during braking. In view of their reduced charging times, the batteries of the present invention may provide an efficient means for storing such braking energy.
- Additionally, the disclosed carbon foam current collectors may be pliable, and therefore, they may be less susceptible to damage from vibration or shock as compared to current collectors made from graphite plates or other brittle materials. Batteries including carbon foam current collectors may perform well in vehicular applications, or other applications, where vibration and shock are common.
- Further, by including carbon foam current collectors having a density of less than about 0.6 g/cm3, the battery of the present invention may weigh substantially less that batteries including either lead current collectors or graphite plate current collectors. Other aspects and features of the present invention can be obtained from a study of the drawings, the disclosure, and the appended claims.
Claims (21)
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US11/098,458 US20050191555A1 (en) | 2002-06-28 | 2005-04-05 | Battery including carbon foam current collectors |
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US10/183,471 US20040002006A1 (en) | 2002-06-28 | 2002-06-28 | Battery including carbon foam current collectors |
US10/798,875 US6979513B2 (en) | 2002-06-28 | 2004-03-12 | Battery including carbon foam current collectors |
US11/098,458 US20050191555A1 (en) | 2002-06-28 | 2005-04-05 | Battery including carbon foam current collectors |
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Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2006105188A1 (en) * | 2005-03-31 | 2006-10-05 | Firefly Energy Inc. | Modular bipolar battery |
US20070154807A1 (en) * | 2005-12-30 | 2007-07-05 | Yevgen Kalynushkin | Nanostructural Electrode and Method of Forming the Same |
US20070209584A1 (en) * | 2006-03-08 | 2007-09-13 | Yevgen Kalynushkin | Apparatus for forming structured material for energy storage device and method |
US20070224513A1 (en) * | 2006-03-08 | 2007-09-27 | Yevgen Kalynushkin | Electrode for cell of energy storage device and method of forming the same |
US7341806B2 (en) * | 2002-12-23 | 2008-03-11 | Caterpillar Inc. | Battery having carbon foam current collector |
WO2008064052A3 (en) * | 2006-11-16 | 2008-07-17 | Graftech Int Holdings Inc | Nonconductive carbon foam for battery |
FR2944151A1 (en) * | 2009-04-06 | 2010-10-08 | Commissariat Energie Atomique | LEAD ACID BATTERY ELECTRODE COMPRISING A THROUGH PORE NETWORK AND METHOD FOR MANUFACTURING THE SAME |
US20110104562A1 (en) * | 2009-10-30 | 2011-05-05 | Sang-Won Byun | Secondary battery |
US20110165466A1 (en) * | 2010-01-04 | 2011-07-07 | Aruna Zhamu | Lithium metal-sulfur and lithium ion-sulfur secondary batteries containing a nano-structured cathode and processes for producing same |
US8399134B2 (en) | 2007-11-20 | 2013-03-19 | Firefly Energy, Inc. | Lead acid battery including a two-layer carbon foam current collector |
US20130309565A1 (en) * | 2012-05-17 | 2013-11-21 | Xiang-Ming He | Current collector, electrochemical cell electrode and electrochemical cell |
US8609267B2 (en) | 2009-04-06 | 2013-12-17 | Comissariat a l'Energie Atomique et aux Energies Alternatives | Electrochemical cell with an electrolyte flow, comprising through-electrodes and production method |
US20230027323A1 (en) * | 2021-07-20 | 2023-01-26 | GM Global Technology Operations LLC | Electrode coating using a porous current collector |
Families Citing this family (53)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20060165876A1 (en) * | 2004-03-26 | 2006-07-27 | Elod Gyenge | Current Collector Structure and Methods to Improve the Performance of a Lead-Acid Battery |
KR100726065B1 (en) * | 2004-12-22 | 2007-06-08 | 에스케이 주식회사 | High power lithium unit cell and high power lithium battery pack having the same |
US20060292448A1 (en) * | 2005-02-02 | 2006-12-28 | Elod Gyenge | Current Collector Structure and Methods to Improve the Performance of a Lead-Acid Battery |
US20070248887A1 (en) * | 2006-04-21 | 2007-10-25 | Eskra Technical Products, Inc. | Using metal foam to make high-performance, low-cost lithium batteries |
JP2010501455A (en) * | 2006-08-18 | 2010-01-21 | ファイアフライ エナジー インコーポレイテッド | Composite carbon foam |
BRPI0621977A2 (en) * | 2006-08-31 | 2011-12-20 | Firefly Energy Inc | electrode plate of an energy storage device, and, energy storage device |
US7867608B2 (en) * | 2006-12-29 | 2011-01-11 | Touchstone Research Laboratory, Ltd. | Electrically gradated carbon foam |
US7709139B2 (en) * | 2007-01-22 | 2010-05-04 | Physical Sciences, Inc. | Three dimensional battery |
JP5211526B2 (en) * | 2007-03-29 | 2013-06-12 | Tdk株式会社 | All-solid lithium ion secondary battery and method for producing the same |
JP5157216B2 (en) | 2007-03-29 | 2013-03-06 | Tdk株式会社 | Method for producing active material and active material |
JP5211527B2 (en) * | 2007-03-29 | 2013-06-12 | Tdk株式会社 | All-solid lithium ion secondary battery and method for producing the same |
US20080274407A1 (en) * | 2007-05-03 | 2008-11-06 | Roy Joseph Bourcier | Layered carbon electrodes for capacitive deionization and methods of making the same |
US20080297980A1 (en) * | 2007-05-31 | 2008-12-04 | Roy Joseph Bourcier | Layered carbon electrodes useful in electric double layer capacitors and capacitive deionization and methods of making the same |
US20090291368A1 (en) * | 2007-08-17 | 2009-11-26 | Aron Newman | Carbon Foam Based Three-Dimensional Batteries and Methods |
US7933114B2 (en) * | 2007-08-31 | 2011-04-26 | Corning Incorporated | Composite carbon electrodes useful in electric double layer capacitors and capacitive deionization and methods of making the same |
US7766981B2 (en) * | 2007-11-30 | 2010-08-03 | Corning Incorporated | Electrode stack for capacitive device |
US8628707B2 (en) * | 2008-01-08 | 2014-01-14 | Carbonxt Group Limited | System and method for making carbon foam anodes |
US8617492B2 (en) * | 2008-01-08 | 2013-12-31 | Carbonxt Group Limited | System and method for making low volatile carboneaceous matter with supercritical CO2 |
US8691166B2 (en) * | 2008-01-08 | 2014-04-08 | Carbonxt Group Limited | System and method for activating carbonaceous material |
US20090172998A1 (en) * | 2008-01-08 | 2009-07-09 | Carbonxt Group Limited | System and method for refining carbonaceous material |
WO2009131700A2 (en) | 2008-04-25 | 2009-10-29 | Envia Systems, Inc. | High energy lithium ion batteries with particular negative electrode compositions |
US8017273B2 (en) | 2008-04-28 | 2011-09-13 | Ut-Battelle Llc | Lightweight, durable lead-acid batteries |
ES2374426T3 (en) * | 2008-06-09 | 2012-02-16 | Commissariat à l'énergie atomique et aux énergies alternatives | PROCEDURE OF PRODUCTION OF AN ELECTRODE FOR A LEAD-ACID BATTERY. |
US7732098B2 (en) * | 2008-07-11 | 2010-06-08 | Eliot Gerber | Lead acid battery having ultra-thin titanium grids |
US20100009262A1 (en) * | 2008-07-11 | 2010-01-14 | Eliot Gerber | Non-lead grid cores for lead acid battery and method of their production |
US8048572B2 (en) * | 2008-07-11 | 2011-11-01 | Eliot Samuel Gerber | Long life lead acid battery having titanium core grids and method of their production |
US9012073B2 (en) * | 2008-11-11 | 2015-04-21 | Envia Systems, Inc. | Composite compositions, negative electrodes with composite compositions and corresponding batteries |
US20100124702A1 (en) * | 2008-11-17 | 2010-05-20 | Physical Sciences, Inc. | High Energy Composite Cathodes for Lithium Ion Batteries |
US8232005B2 (en) | 2008-11-17 | 2012-07-31 | Eliot Gerber | Lead acid battery with titanium core grids and carbon based grids |
CA2726308C (en) * | 2009-02-05 | 2011-11-01 | Evt Power, Inc. | Multiply-conductive matrix for battery current collectors |
US8617747B2 (en) * | 2009-02-24 | 2013-12-31 | Firefly Energy, Inc. | Electrode plate for a battery |
EP2497144A4 (en) | 2009-11-03 | 2014-04-23 | Envia Systems Inc | High capacity anode materials for lithium ion batteries |
US8709663B2 (en) | 2010-05-10 | 2014-04-29 | Xiaogang Wang | Current collector for lead acid battery |
US9065144B2 (en) * | 2010-08-12 | 2015-06-23 | Cardiac Pacemakers, Inc. | Electrode including a 3D framework formed of fluorinated carbon |
US9083048B2 (en) | 2010-08-12 | 2015-07-14 | Cardiac Pacemakers, Inc. | Carbon monofluoride impregnated current collector including a 3D framework |
JP5727618B2 (en) | 2010-11-10 | 2015-06-03 | エピック ベンチャーズ インコーポレイテッドEpic Ventures Inc. | Lead acid cell with active material held in lattice |
WO2012116200A2 (en) | 2011-02-24 | 2012-08-30 | Firefly Energy, Inc. | Improved battery plate with multiple tabs and mixed pore diameters |
US9601228B2 (en) | 2011-05-16 | 2017-03-21 | Envia Systems, Inc. | Silicon oxide based high capacity anode materials for lithium ion batteries |
US9139441B2 (en) | 2012-01-19 | 2015-09-22 | Envia Systems, Inc. | Porous silicon based anode material formed using metal reduction |
US10553871B2 (en) | 2012-05-04 | 2020-02-04 | Zenlabs Energy, Inc. | Battery cell engineering and design to reach high energy |
US9780358B2 (en) | 2012-05-04 | 2017-10-03 | Zenlabs Energy, Inc. | Battery designs with high capacity anode materials and cathode materials |
KR101464515B1 (en) * | 2012-10-24 | 2014-11-25 | 주식회사 비츠로셀 | Ni-Zn FLOW BATTERY WITH LONG LIFE TIME |
DE102013019309B4 (en) | 2012-11-14 | 2014-07-24 | Technische Universität Bergakademie Freiberg | Method for casting open-pored cellular metal parts |
US10020491B2 (en) | 2013-04-16 | 2018-07-10 | Zenlabs Energy, Inc. | Silicon-based active materials for lithium ion batteries and synthesis with solution processing |
US10886526B2 (en) | 2013-06-13 | 2021-01-05 | Zenlabs Energy, Inc. | Silicon-silicon oxide-carbon composites for lithium battery electrodes and methods for forming the composites |
WO2015024004A1 (en) | 2013-08-16 | 2015-02-19 | Envia Systems, Inc. | Lithium ion batteries with high capacity anode active material and good cycling for consumer electronics |
CN111628132B (en) | 2014-05-05 | 2023-04-07 | 戴瑞米克有限责任公司 | Improved lead acid battery separator, electrode, battery and method of manufacture and use thereof |
US20150357649A1 (en) * | 2014-06-05 | 2015-12-10 | The Aerospace Corporation | Battery and method of assembling same |
US9863045B2 (en) | 2015-03-24 | 2018-01-09 | Council Of Scientific & Industrial Research | Electrochemical process for the preparation of lead foam |
US9741499B2 (en) * | 2015-08-24 | 2017-08-22 | Nanotek Instruments, Inc. | Production process for a supercapacitor having a high volumetric energy density |
US11094925B2 (en) | 2017-12-22 | 2021-08-17 | Zenlabs Energy, Inc. | Electrodes with silicon oxide active materials for lithium ion cells achieving high capacity, high energy density and long cycle life performance |
WO2019147790A1 (en) * | 2018-01-24 | 2019-08-01 | Ut-Battelle, Llc | Carbon electrodes based capacitive deionization for the desalination of water |
EP3614463A1 (en) | 2018-08-20 | 2020-02-26 | BGT Materials Limited | Electrode structure of electrochemical energy storage device and manufacturing method thereof |
Citations (91)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2843649A (en) * | 1956-11-30 | 1958-07-15 | Myron A Coler | Moldable miniature battery |
US3021379A (en) * | 1960-04-21 | 1962-02-13 | Roland D Jackel | Ceramic separators for primary batteries |
US3188242A (en) * | 1959-01-22 | 1965-06-08 | Union Carbide Corp | Fuel cell battery containing flat carbon electrodes |
US3442717A (en) * | 1964-10-02 | 1969-05-06 | Varta Ag | Process for enveloping battery electrode plates in separators |
US3510359A (en) * | 1967-03-22 | 1970-05-05 | Standard Oil Co | Fused salt electrochemical battery with inorganic separator |
US3565694A (en) * | 1969-03-17 | 1971-02-23 | Yardney International Corp | Bipolar electrode and method of making same |
US3597829A (en) * | 1969-03-18 | 1971-08-10 | Us Army | Method of making a nickel hydroxide electrode |
US3635676A (en) * | 1969-11-05 | 1972-01-18 | Atomic Energy Commission | Method for increasing the strength of carbon foam |
US3832426A (en) * | 1972-12-19 | 1974-08-27 | Atomic Energy Commission | Syntactic carbon foam |
US3833424A (en) * | 1972-03-28 | 1974-09-03 | Licentia Gmbh | Gas fuel cell battery having bipolar graphite foam electrodes |
US3960770A (en) * | 1973-08-03 | 1976-06-01 | The Dow Chemical Company | Process for preparing macroporous open-cell carbon foam from normally crystalline vinylidene chloride polymer |
US4011374A (en) * | 1975-12-02 | 1977-03-08 | The United States Of America As Represented By The United States Energy Research And Development Administration | Porous carbonaceous electrode structure and method for secondary electrochemical cell |
US4084041A (en) * | 1976-01-30 | 1978-04-11 | Ford Motor Company | Secondary battery or cell with polysulfide wettable electrode - #2 |
US4086404A (en) * | 1976-01-27 | 1978-04-25 | The United States Of America As Represented By The United States Department Of Energy | Electrode including porous particles with embedded active material for use in a secondary electrochemical cell |
US4098967A (en) * | 1973-05-23 | 1978-07-04 | Gould Inc. | Electrochemical system using conductive plastic |
US4134192A (en) * | 1976-10-12 | 1979-01-16 | Gould Inc. | Composite battery plate grid |
US4152825A (en) * | 1974-06-10 | 1979-05-08 | Polaroid Corporation | Method of making a flat battery |
US4188464A (en) * | 1978-07-31 | 1980-02-12 | Hooker Chemicals & Plastics Corp. | Bipolar electrode with intermediate graphite layer and polymeric layers |
US4224392A (en) * | 1977-12-16 | 1980-09-23 | Oswin Harry G | Nickel-oxide electrode structure and method of making same |
US4275130A (en) * | 1979-09-27 | 1981-06-23 | California Institute Of Technology | Bipolar battery construction |
US4339322A (en) * | 1980-04-21 | 1982-07-13 | General Electric Company | Carbon fiber reinforced fluorocarbon-graphite bipolar current collector-separator |
US4374186A (en) * | 1981-04-29 | 1983-02-15 | The United States Of America As Represented By The Secretary Of The Navy | Polymer packaged cell in a sack |
US4566877A (en) * | 1983-04-07 | 1986-01-28 | Institut De Recherches De La Siderurgie Francaise | Carbon foam usable as blast-furnace fuel and method of making same |
US4717633A (en) * | 1985-11-25 | 1988-01-05 | Eric Hauser | Electrode structure for lightweight storage battery |
US4749451A (en) * | 1986-02-05 | 1988-06-07 | Basf Aktiengesellschaft | Electrochemical coating of carbon fibers |
US4759473A (en) * | 1979-06-08 | 1988-07-26 | Super Sack Manufacturing Corporation | Collapsible receptacle with integral sling |
US4865931A (en) * | 1983-12-05 | 1989-09-12 | The Dow Chemical Company | Secondary electrical energy storage device and electrode therefor |
US4900643A (en) * | 1988-04-08 | 1990-02-13 | Globe-Union Inc. | Lead acid bipolar battery plate and method of making the same |
US5017446A (en) * | 1989-10-24 | 1991-05-21 | Globe-Union Inc. | Electrodes containing conductive metal oxides |
US5106709A (en) * | 1990-07-20 | 1992-04-21 | Globe-Union Inc. | Composite substrate for bipolar electrode |
US5200281A (en) * | 1991-11-18 | 1993-04-06 | Westinghouse Electric Corp. | Sintered bipolar battery plates |
US5208003A (en) * | 1992-10-13 | 1993-05-04 | Martin Marietta Energy Systems, Inc. | Microcellular carbon foam and method |
US5223352A (en) * | 1992-01-07 | 1993-06-29 | Rudolph V. Pitts | Lead-acid battery with dimensionally isotropic graphite additive in active material |
US5229228A (en) * | 1990-05-25 | 1993-07-20 | Sorapec S.A. | Current collector/support for a lead/lead oxide battery |
US5300272A (en) * | 1992-10-13 | 1994-04-05 | Martin Marietta Energy Systems, Inc. | Microcellular carbon foam and method |
US5348817A (en) * | 1993-06-02 | 1994-09-20 | Gnb Battery Technologies Inc. | Bipolar lead-acid battery |
US5393619A (en) * | 1993-07-08 | 1995-02-28 | Regents Of The University Of California | Cell separator for use in bipolar-stack energy storage devices |
US5395709A (en) * | 1993-10-18 | 1995-03-07 | Westinghouse Electric Corporation | Carbon bipolar walls for batteries and method for producing same |
US5402306A (en) * | 1992-01-17 | 1995-03-28 | Regents Of The University Of California | Aquagel electrode separator for use in batteries and supercapacitors |
US5411818A (en) * | 1993-10-18 | 1995-05-02 | Westinghouse Electric Corporation | Perimeter seal on bipolar walls for use in high temperature molten electrolyte batteries |
US5426006A (en) * | 1993-04-16 | 1995-06-20 | Sandia Corporation | Structural micro-porous carbon anode for rechargeable lithium-ion batteries |
US5429893A (en) * | 1994-02-04 | 1995-07-04 | Motorola, Inc. | Electrochemical capacitors having dissimilar electrodes |
US5441824A (en) * | 1994-12-23 | 1995-08-15 | Aerovironment, Inc. | Quasi-bipolar battery requiring no casing |
US5498489A (en) * | 1995-04-14 | 1996-03-12 | Dasgupta; Sankar | Rechargeable non-aqueous lithium battery having stacked electrochemical cells |
US5508131A (en) * | 1994-04-07 | 1996-04-16 | Globe-Union Inc. | Injection molded battery containment for bipolar batteries |
US5512390A (en) * | 1994-07-21 | 1996-04-30 | Photran Corporation | Light-weight electrical-storage battery |
US5538810A (en) * | 1990-09-14 | 1996-07-23 | Kaun; Thomas D. | Corrosion resistant ceramic materials |
US5543247A (en) * | 1994-04-28 | 1996-08-06 | Northrop Grumman Corporation | High temperature cell electrical insulation |
US5593797A (en) * | 1993-02-24 | 1997-01-14 | Trojan Battery Company | Electrode plate construction |
US5595840A (en) * | 1995-11-27 | 1997-01-21 | Gnb Technologies, Inc. | Method of manufacturing modular molded components for a bipolar battery and the resulting bipolar battery |
US5626977A (en) * | 1995-02-21 | 1997-05-06 | Regents Of The University Of California | Composite carbon foam electrode |
US5636437A (en) * | 1995-05-12 | 1997-06-10 | Regents Of The University Of California | Fabricating solid carbon porous electrodes from powders |
US5643684A (en) * | 1994-06-09 | 1997-07-01 | Sumitomo Electric Industries, Ltd. | Unwoven metal fabric |
US5667909A (en) * | 1995-06-23 | 1997-09-16 | Power Conversion, Inc. | Electrodes configured for high energy density galvanic cells |
US5705259A (en) * | 1994-11-17 | 1998-01-06 | Globe-Union Inc. | Method of using a bipolar electrochemical storage device |
US5712054A (en) * | 1994-01-06 | 1998-01-27 | Electrion, Inc. | Rechargeable hydrogen battery |
US5723232A (en) * | 1995-04-24 | 1998-03-03 | Sharp Kabushiki Kaisha | Carbon electrode for nonaqueous secondary battery and nonaqueous battery using the same |
US5738907A (en) * | 1995-08-04 | 1998-04-14 | Eltech Systems Corporation | Conductive metal porous sheet production |
US5766789A (en) * | 1995-09-29 | 1998-06-16 | Energetics Systems Corporation | Electrical energy devices |
US5766797A (en) * | 1996-11-27 | 1998-06-16 | Medtronic, Inc. | Electrolyte for LI/SVO batteries |
US5882621A (en) * | 1995-12-07 | 1999-03-16 | Sandia Corporation | Method of preparation of carbon materials for use as electrodes in rechargeable batteries |
US5888469A (en) * | 1995-05-31 | 1999-03-30 | West Virginia University | Method of making a carbon foam material and resultant product |
US5932185A (en) * | 1993-08-23 | 1999-08-03 | The Regents Of The University Of California | Method for making thin carbon foam electrodes |
US6033506A (en) * | 1997-09-02 | 2000-03-07 | Lockheed Martin Engery Research Corporation | Process for making carbon foam |
US6037032A (en) * | 1997-09-02 | 2000-03-14 | Lockheed Martin Energy Research Corp. | Pitch-based carbon foam heat sink with phase change material |
US6045943A (en) * | 1997-11-04 | 2000-04-04 | Wilson Greatbatch Ltd. | Electrode assembly for high energy density batteries |
US6060198A (en) * | 1998-05-29 | 2000-05-09 | Snaper; Alvin A. | Electrochemical battery structure and method |
US6077464A (en) * | 1996-12-19 | 2000-06-20 | Alliedsignal Inc. | Process of making carbon-carbon composite material made from densified carbon foam |
US6077623A (en) * | 1996-12-06 | 2000-06-20 | Grosvenor; Victor L. | Bipolar lead-acid battery plates and method of making same |
US6103149A (en) * | 1996-07-12 | 2000-08-15 | Ultramet | Method for producing controlled aspect ratio reticulated carbon foam and the resultant foam |
US6117592A (en) * | 1995-04-03 | 2000-09-12 | Mitsubishi Materials Corporation | Porus metallic material having high specific surface area, method of producing the same, porus metallic plate material and electrode for alkaline secondary battery |
US6183854B1 (en) * | 1999-01-22 | 2001-02-06 | West Virginia University | Method of making a reinforced carbon foam material and related product |
US6193871B1 (en) * | 1998-12-09 | 2001-02-27 | Eagle-Picher Industries, Inc. | Process of forming a nickel electrode |
US6217841B1 (en) * | 1991-11-21 | 2001-04-17 | Pechiney Recherche | Process for the preparation of metal carbides having a large specific surface from activated carbon foams |
US6245461B1 (en) * | 1999-05-24 | 2001-06-12 | Daimlerchrysler | Battery package having cubical form |
US6248467B1 (en) * | 1998-10-23 | 2001-06-19 | The Regents Of The University Of California | Composite bipolar plate for electrochemical cells |
US6258473B1 (en) * | 1997-04-04 | 2001-07-10 | Wilson Greatbatch Ltd. | Electrochemical cell having multiplate electrodes with differing discharge rate regions |
US6287721B1 (en) * | 1998-09-24 | 2001-09-11 | Thomas & Betts International, Inc. | Process for manufacturing electrochemical cells |
US6379845B1 (en) * | 1999-04-06 | 2002-04-30 | Sumitomo Electric Industries, Ltd. | Conductive porous body and metallic porous body and battery plate both produced by using the same |
US6383687B1 (en) * | 1998-06-29 | 2002-05-07 | Stork Screens, B.V. | Production of a porous foam product for battery electrodes |
US6395423B1 (en) * | 1992-11-30 | 2002-05-28 | Canon Kabushiki Kaisha | High energy density secondary battery for repeated use |
US6438964B1 (en) * | 2001-09-10 | 2002-08-27 | Percy Giblin | Thermoelectric heat pump appliance with carbon foam heat sink |
US6528204B1 (en) * | 1999-09-22 | 2003-03-04 | Koninklijke Philips Electronics N.V. | Lithium secondary battery comprising individual cells with one another, as well as watches, computers and communication equipment provided with a battery |
US6566004B1 (en) * | 2000-08-31 | 2003-05-20 | General Motors Corporation | Fuel cell with variable porosity gas distribution layers |
US6569559B1 (en) * | 1997-07-25 | 2003-05-27 | 3M Innovative Properties Company | Method for transferring thermal energy and electrical current in thin-film electrochemical cells |
US6576365B1 (en) * | 1999-12-06 | 2003-06-10 | E.C.R. - Electro Chemical Research Ltd. | Ultra-thin electrochemical energy storage devices |
US6605390B1 (en) * | 1999-09-10 | 2003-08-12 | Daimlerchrysler Corporation | Lithium ion battery utilizing carbon foam electrodes |
US6607039B2 (en) * | 2001-10-08 | 2003-08-19 | American-Iowa Mfg. Inc. | Core processor |
US6706079B1 (en) * | 2002-05-03 | 2004-03-16 | C And T Company, Inc. | Method of formation and charge of the negative polarizable carbon electrode in an electric double layer capacitor |
US6899970B1 (en) * | 2001-06-25 | 2005-05-31 | Touchstone Research Laboratory, Ltd. | Electrochemical cell electrodes comprising coal-based carbon foam |
US7060391B2 (en) * | 2001-09-26 | 2006-06-13 | Power Technology, Inc. | Current collector structure and methods to improve the performance of a lead-acid battery |
Family Cites Families (32)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1285660A (en) | 1918-04-04 | 1918-11-26 | Bruce Ford | Secondary or storage battery. |
US2658099A (en) | 1948-10-20 | 1953-11-03 | Basset Lucien Paul | Microporous carbon and graphite articles, including impregnated battery electrodes and methods of making the same |
US2620369A (en) | 1950-08-02 | 1952-12-02 | Arthur F Daniel | Plastic-cased dry cells |
US3857913A (en) | 1969-10-21 | 1974-12-31 | Atomic Energy Commission | Method for the manufacture of carbon foam |
US4125676A (en) | 1977-08-15 | 1978-11-14 | United Technologies Corp. | Carbon foam fuel cell components |
US4363857A (en) | 1981-10-16 | 1982-12-14 | General Motors Corporation | Laminated metal-plastic battery grid |
JPS6089071A (en) | 1983-10-19 | 1985-05-18 | Japan Storage Battery Co Ltd | Paste type lead-acid battery |
GB8523444D0 (en) * | 1985-09-23 | 1985-10-30 | Lilliwyte Sa | Electrochemical cell |
US4758473A (en) | 1986-11-20 | 1988-07-19 | Electric Power Research Institute, Inc. | Stable carbon-plastic electrodes and method of preparation thereof |
GB8812586D0 (en) * | 1988-05-27 | 1988-06-29 | Lilliwyte Sa | Electrochemical cell |
US5162172A (en) | 1990-12-14 | 1992-11-10 | Arch Development Corporation | Bipolar battery |
GB9208463D0 (en) | 1992-04-16 | 1992-06-03 | Merck Sharp & Dohme | Therapeutic agents |
US5569563A (en) | 1992-11-12 | 1996-10-29 | Ovshinsky; Stanford R. | Nickel metal hybride battery containing a modified disordered multiphase nickel hydroxide positive electrode |
US5409786A (en) * | 1993-02-05 | 1995-04-25 | Eveready Battery Company, Inc. | Inactive electrochemical cell having an ionically nonconductive polymeric composition activated by electrolyte salt solution |
US5374490A (en) | 1993-05-19 | 1994-12-20 | Portable Energy Products, Inc. | Rechargeable battery |
JP3277413B2 (en) | 1993-08-17 | 2002-04-22 | ソニー株式会社 | Prismatic battery |
US5474621A (en) | 1994-09-19 | 1995-12-12 | Energy Conversion Devices, Inc. | Current collection system for photovoltaic cells |
US6001761A (en) | 1994-09-27 | 1999-12-14 | Nippon Shokubai Co., Ltd. | Ceramics sheet and production method for same |
US5563007A (en) | 1995-01-11 | 1996-10-08 | Entek Manufacturing Inc. | Method of enveloping and assembling battery plates and product produced thereby |
US5677075A (en) | 1995-09-28 | 1997-10-14 | Fujita; Kenichi | Activated lead-acid battery with carbon suspension electrolyte |
JPH09306506A (en) * | 1996-05-17 | 1997-11-28 | Nisshinbo Ind Inc | Current collector for molten salt battery, manufacture of current collecting material for it, and molten salt battery using its current collector |
US6051096A (en) * | 1996-07-11 | 2000-04-18 | Nagle; Dennis C. | Carbonized wood and materials formed therefrom |
DE19629154C2 (en) | 1996-07-19 | 2000-07-06 | Dornier Gmbh | Bipolar electrode-electrolyte unit |
US6869547B2 (en) * | 1996-12-09 | 2005-03-22 | Valence Technology, Inc. | Stabilized electrochemical cell active material |
US6146780A (en) | 1997-01-24 | 2000-11-14 | Lynntech, Inc. | Bipolar separator plates for electrochemical cell stacks |
US5993996A (en) | 1997-09-16 | 1999-11-30 | Inorganic Specialists, Inc. | Carbon supercapacitor electrode materials |
US6127061A (en) | 1999-01-26 | 2000-10-03 | High-Density Energy, Inc. | Catalytic air cathode for air-metal batteries |
FR2800917B1 (en) * | 1999-11-10 | 2002-01-25 | Cit Alcatel | THREE-DIMENSIONAL SUPPORT ELECTRODE FOR USE IN AN ALKALI ELECTROLYTE SECONDARY GENERATOR |
JP5021889B2 (en) * | 2002-02-12 | 2012-09-12 | エバレデイ バツテリ カンパニー インコーポレーテツド | Flexible thin printed battery and device, and manufacturing method thereof |
US20040002006A1 (en) * | 2002-06-28 | 2004-01-01 | Caterpillar Inc. | Battery including carbon foam current collectors |
US7033703B2 (en) * | 2002-12-20 | 2006-04-25 | Firefly Energy, Inc. | Composite material and current collector for battery |
US7341806B2 (en) * | 2002-12-23 | 2008-03-11 | Caterpillar Inc. | Battery having carbon foam current collector |
-
2004
- 2004-03-12 US US10/798,875 patent/US6979513B2/en not_active Expired - Lifetime
- 2004-12-16 WO PCT/US2004/042286 patent/WO2005096418A1/en active Application Filing
-
2005
- 2005-04-05 US US11/098,458 patent/US20050191555A1/en not_active Abandoned
Patent Citations (99)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2843649A (en) * | 1956-11-30 | 1958-07-15 | Myron A Coler | Moldable miniature battery |
US3188242A (en) * | 1959-01-22 | 1965-06-08 | Union Carbide Corp | Fuel cell battery containing flat carbon electrodes |
US3021379A (en) * | 1960-04-21 | 1962-02-13 | Roland D Jackel | Ceramic separators for primary batteries |
US3442717A (en) * | 1964-10-02 | 1969-05-06 | Varta Ag | Process for enveloping battery electrode plates in separators |
US3510359A (en) * | 1967-03-22 | 1970-05-05 | Standard Oil Co | Fused salt electrochemical battery with inorganic separator |
US3565694A (en) * | 1969-03-17 | 1971-02-23 | Yardney International Corp | Bipolar electrode and method of making same |
US3597829A (en) * | 1969-03-18 | 1971-08-10 | Us Army | Method of making a nickel hydroxide electrode |
US3635676A (en) * | 1969-11-05 | 1972-01-18 | Atomic Energy Commission | Method for increasing the strength of carbon foam |
US3833424A (en) * | 1972-03-28 | 1974-09-03 | Licentia Gmbh | Gas fuel cell battery having bipolar graphite foam electrodes |
US3832426A (en) * | 1972-12-19 | 1974-08-27 | Atomic Energy Commission | Syntactic carbon foam |
US4098967A (en) * | 1973-05-23 | 1978-07-04 | Gould Inc. | Electrochemical system using conductive plastic |
US3960770A (en) * | 1973-08-03 | 1976-06-01 | The Dow Chemical Company | Process for preparing macroporous open-cell carbon foam from normally crystalline vinylidene chloride polymer |
US4152825A (en) * | 1974-06-10 | 1979-05-08 | Polaroid Corporation | Method of making a flat battery |
US4011374A (en) * | 1975-12-02 | 1977-03-08 | The United States Of America As Represented By The United States Energy Research And Development Administration | Porous carbonaceous electrode structure and method for secondary electrochemical cell |
US4086404A (en) * | 1976-01-27 | 1978-04-25 | The United States Of America As Represented By The United States Department Of Energy | Electrode including porous particles with embedded active material for use in a secondary electrochemical cell |
US4084041A (en) * | 1976-01-30 | 1978-04-11 | Ford Motor Company | Secondary battery or cell with polysulfide wettable electrode - #2 |
US4134192A (en) * | 1976-10-12 | 1979-01-16 | Gould Inc. | Composite battery plate grid |
US4224392A (en) * | 1977-12-16 | 1980-09-23 | Oswin Harry G | Nickel-oxide electrode structure and method of making same |
US4188464A (en) * | 1978-07-31 | 1980-02-12 | Hooker Chemicals & Plastics Corp. | Bipolar electrode with intermediate graphite layer and polymeric layers |
US4759473A (en) * | 1979-06-08 | 1988-07-26 | Super Sack Manufacturing Corporation | Collapsible receptacle with integral sling |
US4275130A (en) * | 1979-09-27 | 1981-06-23 | California Institute Of Technology | Bipolar battery construction |
US4339322A (en) * | 1980-04-21 | 1982-07-13 | General Electric Company | Carbon fiber reinforced fluorocarbon-graphite bipolar current collector-separator |
US4374186A (en) * | 1981-04-29 | 1983-02-15 | The United States Of America As Represented By The Secretary Of The Navy | Polymer packaged cell in a sack |
US4566877A (en) * | 1983-04-07 | 1986-01-28 | Institut De Recherches De La Siderurgie Francaise | Carbon foam usable as blast-furnace fuel and method of making same |
US4865931A (en) * | 1983-12-05 | 1989-09-12 | The Dow Chemical Company | Secondary electrical energy storage device and electrode therefor |
US4717633A (en) * | 1985-11-25 | 1988-01-05 | Eric Hauser | Electrode structure for lightweight storage battery |
US4749451A (en) * | 1986-02-05 | 1988-06-07 | Basf Aktiengesellschaft | Electrochemical coating of carbon fibers |
US4900643A (en) * | 1988-04-08 | 1990-02-13 | Globe-Union Inc. | Lead acid bipolar battery plate and method of making the same |
US5017446A (en) * | 1989-10-24 | 1991-05-21 | Globe-Union Inc. | Electrodes containing conductive metal oxides |
US5229228A (en) * | 1990-05-25 | 1993-07-20 | Sorapec S.A. | Current collector/support for a lead/lead oxide battery |
US5106709A (en) * | 1990-07-20 | 1992-04-21 | Globe-Union Inc. | Composite substrate for bipolar electrode |
US5538810A (en) * | 1990-09-14 | 1996-07-23 | Kaun; Thomas D. | Corrosion resistant ceramic materials |
US5200281A (en) * | 1991-11-18 | 1993-04-06 | Westinghouse Electric Corp. | Sintered bipolar battery plates |
US6217841B1 (en) * | 1991-11-21 | 2001-04-17 | Pechiney Recherche | Process for the preparation of metal carbides having a large specific surface from activated carbon foams |
US5223352A (en) * | 1992-01-07 | 1993-06-29 | Rudolph V. Pitts | Lead-acid battery with dimensionally isotropic graphite additive in active material |
US5529971A (en) * | 1992-01-17 | 1996-06-25 | Regents Of The University Of California | Carbon foams for energy storage devices |
US5402306A (en) * | 1992-01-17 | 1995-03-28 | Regents Of The University Of California | Aquagel electrode separator for use in batteries and supercapacitors |
US5300272A (en) * | 1992-10-13 | 1994-04-05 | Martin Marietta Energy Systems, Inc. | Microcellular carbon foam and method |
US5208003A (en) * | 1992-10-13 | 1993-05-04 | Martin Marietta Energy Systems, Inc. | Microcellular carbon foam and method |
US6395423B1 (en) * | 1992-11-30 | 2002-05-28 | Canon Kabushiki Kaisha | High energy density secondary battery for repeated use |
US5593797A (en) * | 1993-02-24 | 1997-01-14 | Trojan Battery Company | Electrode plate construction |
US5426006A (en) * | 1993-04-16 | 1995-06-20 | Sandia Corporation | Structural micro-porous carbon anode for rechargeable lithium-ion batteries |
US5348817A (en) * | 1993-06-02 | 1994-09-20 | Gnb Battery Technologies Inc. | Bipolar lead-acid battery |
US5393619A (en) * | 1993-07-08 | 1995-02-28 | Regents Of The University Of California | Cell separator for use in bipolar-stack energy storage devices |
US5932185A (en) * | 1993-08-23 | 1999-08-03 | The Regents Of The University Of California | Method for making thin carbon foam electrodes |
US5411818A (en) * | 1993-10-18 | 1995-05-02 | Westinghouse Electric Corporation | Perimeter seal on bipolar walls for use in high temperature molten electrolyte batteries |
US5395709A (en) * | 1993-10-18 | 1995-03-07 | Westinghouse Electric Corporation | Carbon bipolar walls for batteries and method for producing same |
US5712054A (en) * | 1994-01-06 | 1998-01-27 | Electrion, Inc. | Rechargeable hydrogen battery |
US5429893A (en) * | 1994-02-04 | 1995-07-04 | Motorola, Inc. | Electrochemical capacitors having dissimilar electrodes |
US5508131A (en) * | 1994-04-07 | 1996-04-16 | Globe-Union Inc. | Injection molded battery containment for bipolar batteries |
US5543247A (en) * | 1994-04-28 | 1996-08-06 | Northrop Grumman Corporation | High temperature cell electrical insulation |
US5643684A (en) * | 1994-06-09 | 1997-07-01 | Sumitomo Electric Industries, Ltd. | Unwoven metal fabric |
US5512390A (en) * | 1994-07-21 | 1996-04-30 | Photran Corporation | Light-weight electrical-storage battery |
US5705259A (en) * | 1994-11-17 | 1998-01-06 | Globe-Union Inc. | Method of using a bipolar electrochemical storage device |
US5441824A (en) * | 1994-12-23 | 1995-08-15 | Aerovironment, Inc. | Quasi-bipolar battery requiring no casing |
US5626977A (en) * | 1995-02-21 | 1997-05-06 | Regents Of The University Of California | Composite carbon foam electrode |
US5898564A (en) * | 1995-02-21 | 1999-04-27 | Regents Of The University Of California | Capacitor with a composite carbon foam electrode |
US6117592A (en) * | 1995-04-03 | 2000-09-12 | Mitsubishi Materials Corporation | Porus metallic material having high specific surface area, method of producing the same, porus metallic plate material and electrode for alkaline secondary battery |
US5498489A (en) * | 1995-04-14 | 1996-03-12 | Dasgupta; Sankar | Rechargeable non-aqueous lithium battery having stacked electrochemical cells |
US5723232A (en) * | 1995-04-24 | 1998-03-03 | Sharp Kabushiki Kaisha | Carbon electrode for nonaqueous secondary battery and nonaqueous battery using the same |
US5636437A (en) * | 1995-05-12 | 1997-06-10 | Regents Of The University Of California | Fabricating solid carbon porous electrodes from powders |
US6346226B1 (en) * | 1995-05-31 | 2002-02-12 | West Virginia University | Method of making a carbon foam material and resultant product |
US5888469A (en) * | 1995-05-31 | 1999-03-30 | West Virginia University | Method of making a carbon foam material and resultant product |
US6241957B1 (en) * | 1995-05-31 | 2001-06-05 | West Virginia University | Method of making a carbon foam material and resultant product |
US5667909A (en) * | 1995-06-23 | 1997-09-16 | Power Conversion, Inc. | Electrodes configured for high energy density galvanic cells |
US5738907A (en) * | 1995-08-04 | 1998-04-14 | Eltech Systems Corporation | Conductive metal porous sheet production |
US20030036001A1 (en) * | 1995-09-29 | 2003-02-20 | David James | Electrical energy devices |
US5766789A (en) * | 1995-09-29 | 1998-06-16 | Energetics Systems Corporation | Electrical energy devices |
US5595840A (en) * | 1995-11-27 | 1997-01-21 | Gnb Technologies, Inc. | Method of manufacturing modular molded components for a bipolar battery and the resulting bipolar battery |
US5882621A (en) * | 1995-12-07 | 1999-03-16 | Sandia Corporation | Method of preparation of carbon materials for use as electrodes in rechargeable batteries |
US6103149A (en) * | 1996-07-12 | 2000-08-15 | Ultramet | Method for producing controlled aspect ratio reticulated carbon foam and the resultant foam |
US5766797A (en) * | 1996-11-27 | 1998-06-16 | Medtronic, Inc. | Electrolyte for LI/SVO batteries |
US6077623A (en) * | 1996-12-06 | 2000-06-20 | Grosvenor; Victor L. | Bipolar lead-acid battery plates and method of making same |
US6077464A (en) * | 1996-12-19 | 2000-06-20 | Alliedsignal Inc. | Process of making carbon-carbon composite material made from densified carbon foam |
US6258473B1 (en) * | 1997-04-04 | 2001-07-10 | Wilson Greatbatch Ltd. | Electrochemical cell having multiplate electrodes with differing discharge rate regions |
US6569559B1 (en) * | 1997-07-25 | 2003-05-27 | 3M Innovative Properties Company | Method for transferring thermal energy and electrical current in thin-film electrochemical cells |
US6261485B1 (en) * | 1997-09-02 | 2001-07-17 | Ut-Battelle, Llc | Pitch-based carbon foam and composites |
US6387343B1 (en) * | 1997-09-02 | 2002-05-14 | Ut-Battelle, Llc | Pitch-based carbon foam and composites |
US6037032A (en) * | 1997-09-02 | 2000-03-14 | Lockheed Martin Energy Research Corp. | Pitch-based carbon foam heat sink with phase change material |
US6399149B1 (en) * | 1997-09-02 | 2002-06-04 | Ut-Battelle, Llc | Pitch-based carbon foam heat sink with phase change material |
US6033506A (en) * | 1997-09-02 | 2000-03-07 | Lockheed Martin Engery Research Corporation | Process for making carbon foam |
US6045943A (en) * | 1997-11-04 | 2000-04-04 | Wilson Greatbatch Ltd. | Electrode assembly for high energy density batteries |
US6060198A (en) * | 1998-05-29 | 2000-05-09 | Snaper; Alvin A. | Electrochemical battery structure and method |
US6383687B1 (en) * | 1998-06-29 | 2002-05-07 | Stork Screens, B.V. | Production of a porous foam product for battery electrodes |
US6287721B1 (en) * | 1998-09-24 | 2001-09-11 | Thomas & Betts International, Inc. | Process for manufacturing electrochemical cells |
US6248467B1 (en) * | 1998-10-23 | 2001-06-19 | The Regents Of The University Of California | Composite bipolar plate for electrochemical cells |
US6193871B1 (en) * | 1998-12-09 | 2001-02-27 | Eagle-Picher Industries, Inc. | Process of forming a nickel electrode |
US6183854B1 (en) * | 1999-01-22 | 2001-02-06 | West Virginia University | Method of making a reinforced carbon foam material and related product |
US6379845B1 (en) * | 1999-04-06 | 2002-04-30 | Sumitomo Electric Industries, Ltd. | Conductive porous body and metallic porous body and battery plate both produced by using the same |
US6245461B1 (en) * | 1999-05-24 | 2001-06-12 | Daimlerchrysler | Battery package having cubical form |
US6605390B1 (en) * | 1999-09-10 | 2003-08-12 | Daimlerchrysler Corporation | Lithium ion battery utilizing carbon foam electrodes |
US6528204B1 (en) * | 1999-09-22 | 2003-03-04 | Koninklijke Philips Electronics N.V. | Lithium secondary battery comprising individual cells with one another, as well as watches, computers and communication equipment provided with a battery |
US6576365B1 (en) * | 1999-12-06 | 2003-06-10 | E.C.R. - Electro Chemical Research Ltd. | Ultra-thin electrochemical energy storage devices |
US6566004B1 (en) * | 2000-08-31 | 2003-05-20 | General Motors Corporation | Fuel cell with variable porosity gas distribution layers |
US6899970B1 (en) * | 2001-06-25 | 2005-05-31 | Touchstone Research Laboratory, Ltd. | Electrochemical cell electrodes comprising coal-based carbon foam |
US6438964B1 (en) * | 2001-09-10 | 2002-08-27 | Percy Giblin | Thermoelectric heat pump appliance with carbon foam heat sink |
US7060391B2 (en) * | 2001-09-26 | 2006-06-13 | Power Technology, Inc. | Current collector structure and methods to improve the performance of a lead-acid battery |
US6607039B2 (en) * | 2001-10-08 | 2003-08-19 | American-Iowa Mfg. Inc. | Core processor |
US6706079B1 (en) * | 2002-05-03 | 2004-03-16 | C And T Company, Inc. | Method of formation and charge of the negative polarizable carbon electrode in an electric double layer capacitor |
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WO2006105188A1 (en) * | 2005-03-31 | 2006-10-05 | Firefly Energy Inc. | Modular bipolar battery |
US20070154807A1 (en) * | 2005-12-30 | 2007-07-05 | Yevgen Kalynushkin | Nanostructural Electrode and Method of Forming the Same |
US20070209584A1 (en) * | 2006-03-08 | 2007-09-13 | Yevgen Kalynushkin | Apparatus for forming structured material for energy storage device and method |
US20070218366A1 (en) * | 2006-03-08 | 2007-09-20 | Yevgen Kalynushkin | Electrode for energy storage device and method of forming the same |
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WO2008064052A3 (en) * | 2006-11-16 | 2008-07-17 | Graftech Int Holdings Inc | Nonconductive carbon foam for battery |
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Also Published As
Publication number | Publication date |
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WO2005096418A1 (en) | 2005-10-13 |
US6979513B2 (en) | 2005-12-27 |
US20040191632A1 (en) | 2004-09-30 |
WO2005096418B1 (en) | 2005-12-08 |
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