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US20060137168A1 - Method for producing drawn coated metals and use of said metals in the form of a current differentiator for electrochemical components - Google Patents

Method for producing drawn coated metals and use of said metals in the form of a current differentiator for electrochemical components Download PDF

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Publication number
US20060137168A1
US20060137168A1 US10/537,930 US53793005A US2006137168A1 US 20060137168 A1 US20060137168 A1 US 20060137168A1 US 53793005 A US53793005 A US 53793005A US 2006137168 A1 US2006137168 A1 US 2006137168A1
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Prior art keywords
coating
foil
expanded metal
accordance
metal
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Heinz Futscher
Gerold Neumann
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Fraunhofer Gesellschaft zur Foerderung der Angewandten Forschung eV
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Fraunhofer Gesellschaft zur Foerderung der Angewandten Forschung eV
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Publication of US20060137168A1 publication Critical patent/US20060137168A1/en
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    • C—CHEMISTRY; METALLURGY
    • C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
    • C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
    • C25B11/00—Electrodes; Manufacture thereof not otherwise provided for
    • C25B11/04—Electrodes; Manufacture thereof not otherwise provided for characterised by the material
    • C25B11/051—Electrodes formed of electrocatalysts on a substrate or carrier
    • 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
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/052—Li-accumulators
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D31/00—Other methods for working sheet metal, metal tubes, metal profiles
    • B21D31/04—Expanding other than provided for in groups B21D1/00 - B21D28/00, e.g. for making expanded metal
    • 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
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/052—Li-accumulators
    • H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
    • 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
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/056—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes
    • H01M10/0561—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes the electrolyte being constituted of inorganic materials only
    • H01M10/0562—Solid materials
    • 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
    • H01M4/04—Processes of manufacture in general
    • 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
    • H01M4/04—Processes of manufacture in general
    • H01M4/0402—Methods of deposition of the material
    • H01M4/0404—Methods of deposition of the material by coating on electrode collectors
    • 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
    • H01M4/04—Processes of manufacture in general
    • H01M4/0402—Methods of deposition of the material
    • H01M4/0409—Methods of deposition of the material by a doctor blade method, slip-casting or roller coating
    • 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
    • H01M4/04—Processes of manufacture in general
    • H01M4/0402—Methods of deposition of the material
    • H01M4/0414—Methods of deposition of the material by screen printing
    • 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
    • H01M4/04—Processes of manufacture in general
    • H01M4/0402—Methods of deposition of the material
    • H01M4/0416—Methods of deposition of the material involving impregnation with a solution, dispersion, paste or dry powder
    • 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
    • H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
    • 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
    • H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
    • H01M4/139—Processes of manufacture
    • 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
    • H01M4/24—Electrodes for alkaline accumulators
    • H01M4/26—Processes of manufacture
    • 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
    • H01M4/661—Metal or alloys, e.g. alloy coatings
    • 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
    • H01M4/72—Grids
    • H01M4/74—Meshes or woven material; Expanded metal
    • H01M4/745—Expanded metal
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M6/00—Primary cells; Manufacture thereof
    • H01M6/04—Cells with aqueous electrolyte
    • H01M6/06—Dry cells, i.e. cells wherein the electrolyte is rendered non-fluid
    • H01M6/10—Dry cells, i.e. cells wherein the electrolyte is rendered non-fluid with wound or folded electrodes
    • 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
    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/30—Foil or other thin sheet-metal making or treating
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/30—Foil or other thin sheet-metal making or treating
    • Y10T29/301—Method
    • 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/4998—Combined manufacture including applying or shaping of fluent material
    • Y10T29/49982—Coating

Definitions

  • the present invention pertains to a process for manufacturing coated expanded metals, which are suitable for use, among other things, as current collectors in electrochemical components, especially in nonaqueous electrochemical cells.
  • Typical representatives of nonaqueous electrochemical cells are lithium batteries. These have been known in various embodiments for a long time and have been described several times. The design of these cells is as follows: An anode, either one consisting of lithium metal or graphite, is arranged opposite a cathode, usually a stable lithium interstitial compound. The two electrodes are separated by a separator. The complete system is interspersed by an electrolyte, which establishes the ionic conductivity for lithium ions. They are formed, as a rule, by a lithium salt dissolved in one or more organic solvents. Lithium ions move to and fro between the electrodes during charging and discharging.
  • foils are characterized either by a high microporosity, in which the liquid electrolyte is immobilized, or by the addition of suitable polymers, which form a gel with the liquid.
  • the current collectors are metals, which are introduced either as foils or as expanded metals. They shall meet a number of conditions, namely, (a) they must be electrochemically stable against corrosion, (b) they shall have good contact with the particular electrodes to ensure a low contact resistance, (c) they shall have a low weight in order to guarantee high energy densities, and (d) they shall have favorable elastic properties in order to compensate variations in volume during the intercalation and de-intercalation of lithium ions in the electrodes during the operation.
  • Aluminum and graphite have proved to be suitable for use as metals that are stable in the electrochemical environment of the battery for the system used commonly with lithium cobalt oxide as the cathode material and graphite on the anode side.
  • the process being described here is not limited to these metals.
  • FIG. 1 Metal foils ( 1 ) of a suitable thickness are provided with a punched pattern in a punching tool ( 2 ) and then stretched ( 3 ).
  • the geometric data of the expanded metal such as the width of the web, the opening diagonals and the percentage of open area are set by designing the punched pattern and the rate of stretching.
  • expanded metals as current collectors are obvious: Compared to foils, they have an open-pore structure, so that the weight of the current collectors can be reduced, which entails advantages in the gravimetric energy density.
  • the expanded metal is elastic in such a way that it can follow the changes in volume during the intercalation and de-intercalation of lithium in the electrodes, without delamination taking place. Delamination would in turn reduce the cycle life of the batteries.
  • This type of battery is usually manufactured as follows: The electrodes are either deposited directly on metal foils (see U.S. Pat. No. 6,306,215) or are laminated on the current collector by lamination under pressure and optionally under the action of temperature (DE 199 52 335). A firm composite of the three different foils for the anode with the current collector, the separator and the cathode with the current collector is then prepared in a second step by lamination or by the winding technique. This composite is then impregnated with electrolyte liquid. The electrolyte liquid must be distributed uniformly in the complete foil composite. This is achieved essentially by capillary forces.
  • suspensions are commercially available. Methods based on the use of printing rollers, for example, reverse roll coating, are used.
  • the suspensions consist, as a rule, of a carbon/polymer mixture in a suitable solvent, such as water.
  • the layer thickness of the suspensions applied are usually between approx. 1 ⁇ m and approx. 20 ⁇ m. Insufficient wetting is invariably observed in the printing roller process, which leads to nonuniform distribution of the suspension on the metal. As a result, the contact resistance increases or contact is even lost between the current collector and the electrode at the poorly coated sites during the operation of electrochemical components equipped with expanded metals coated in this manner, e.g., batteries, and this has disadvantageous consequences for the service life of the components.
  • the use of thicker adhesion promoter layers is ruled out because of the undesired reduction of the energy density that is associated with this.
  • the object of the present invention is to provide a process for manufacturing coated expanded metals, which leads to improved yields and with which the top side and the underside of thin expanded metals can also be coated with a sufficiently thin layer of conductive adhesion promoters.
  • the said object is accomplished by a process in which a closed metal foil is first coated and this is then converted into expanded metal.
  • This offers the advantage that the coating is applied to a mechanically substantially more stable metal foil, so that a product possessing the necessary properties can be manufactured with a high yield and the amount of rejects can be greatly reduced. Coating may be performed on one side or on both sides. It was quite surprising to find with this procedure that the coating applied to the foil does not flake off during stretching. This was not to be expected at all, because it was not possible to assume that it would be sufficiently elastic and, moreover, possess such a good adhesion that the deformation of the metal lying under the coating does not lead to separation of the coating.
  • FIG. 1 shows the sequence of a laminate suitable for use for a battery
  • FIG. 2 shows the top view of such a laminate
  • FIG. 3 shows a schematic view of the manufacture of the expanded metal
  • FIG. 4 shows a diagram showing the relative capacity of a battery provided with an expanded metal manufactured according to the present invention as a collector
  • FIG. 5 shows the relative capacity of a battery with an expanded metal manufactured according to the present invention as a collector compared to the capacity of a battery with a collector manufactured in the usual manner.
  • the metal may separate in some cases when a greater stretching is carried out.
  • All the materials with which the desired properties that the expanded metal needs for its later use can be obtained are suitable for coating the metal foils that will subsequently be subjected to the expansion process. These are above all good adhesion to the electrodes as well as good electric conductivity in the case of expanded metals used as current collectors.
  • the process according to the present invention is not limited to the manufacture of coated expanded metals for current collectors. It can rather be used wherever thin expanded metals with sensitive, thin coatings are to be used and it is not necessary that the openings generated during the punching and stretching also be coated laterally.
  • materials such as graphite or other suitable carbon materials as well as adhesion-improving organic polymers shall be mentioned as suitable materials for coatings with good adhesion and good electric conductivity.
  • the carbon materials may be applied in a binder, e.g., an organic polymer suspension, which binder can subsequently be dried, (after)cured or subjected to an additional polymerization on the surface.
  • a binder e.g., an organic polymer suspension
  • EB-012 from the firm of Acheson, U.S.A.
  • a graphite suspension which contains a thermoplastic binder.
  • Other examples are suspensions containing silver instead of graphite.
  • the binders may be, e.g., epoxy resins, thermoplastics, duromers, vinyl resins, cellulose or fluoroelastomers.
  • the process according to the present invention was found in light of the poor quality of expanded metals coated according to the printing method. However, it is not limited to specific coating techniques. Instead of application according to the printing method, it is also possible to use, e.g., spin coating, roller coating, application with a doctor blade, dip coating, electrostatic application (powder coating) or the plasma method, as they are known, among other things, from the above-mentioned state of the art.
  • the expanded metals manufactured according to the present invention differ from the conventional ones by the fact that their openings, produced during the punching and stretching, are not coated laterally. However, this is of no disadvantage for their use as current collectors.
  • the expanded metals that are or can be manufactured according to the present invention are especially suitable, among other things, for use in electrochemical cells during the manufacture of which the addition of a plasticizer, which would have to be removed again in a subsequent washing process, to the electrode materials and/or the separator to produce a porosity necessary for taking up the liquid electrolyte is avoided, because this manufacturing process, which is described in the U.S. Pat. Nos. 5,456,000 and 6,063,519, requires, as an additional requirement on the adhesion promoter layer, that this layer be chemically stable in respect to the wash liquid. Partial separation of the electrode foils from the current collector may easily occur during the washing out of the plasticizer, which has unfavorable consequences for the cycle life and the impedance of a battery. It is therefore proposed according to the present invention as an especially favorable solution that electrochemical components be manufactured with the current collectors manufactured according to the present invention, whose electrodes and separator were manufactured without a plasticizer that has to be washed out.
  • a copper foil with a thickness of 50 ⁇ m was coated on both sides with a commercially available suspension EB012 from Acheson Colloids B.V. (a thixotropic graphite suspension in a thermoplastic binder). To set the optimal viscosity for the application, the solids content in the suspension was reduced from 30% to 20% by adding water. Coating was carried out on one side by means of a simple laminating roller first on the front side and, in a second run, on the reverse side. The copper foil was a commercially available standard foil for use in batteries. The wet layer thickness applied was approx. 20 ⁇ m at a feed rate of 2.5 m/minute. Drying was carried out at approx. 80° C.
  • the layer thickness of the adhesion promoter layer was still 4 ⁇ m after drying.
  • the foil thus coated was subsequently subjected to further processing into expanded metal. Stretching was set such that the short diagonal had a length of 1 mm and the long diagonal had a length of 2 mm.
  • the material obtained was free from separations and cracks in the metal and was able to be subjected to further use at a rate of 100%.
  • Example 1 was repeated, and stretching was set such that the short diagonal had a length of 1.5 mm and the long diagonal had a length of 3 mm. There were cracks in the product; it was flaked off in some areas. The reject was about 30% of the area.
  • Example 1 was repeated such that the copper foil was first converted into expanded metal and this was coated as described. A large number of cracked areas and areas with flaked-off coating were found on the material obtained in a non-uniform distribution. Only one of 6 batches (rolls) was suitable for use in such a way that it was able to be used for the further processing of the expanded metal into current collectors. On the whole, more than 50% of the area of the expanded metal was damaged.
  • An aluminum foil with a thickness of 50 ⁇ m was coated on both sides with the above-mentioned, commercially available suspension EB012 from Acheson Colloids B.V. To set the optimal viscosity for the application, the solids content in the suspension was reduced from 30% to 20% by adding water. Coating was carried out by means of a simple laminating roller on one side, first on the front side and, in a second run, on the reverse side.
  • the copper foil was a commercially available standard foil for use in batteries.
  • the wet layer thickness applied was approx. 20 ⁇ m at a feed rate of 2 m/minute. Drying was carried out at approx. 80° C.
  • the layer thickness of the adhesion promoter layer was still 4 ⁇ m after drying.
  • the foil thus coated was subsequently subjected to further processing into expanded metal. Stretching was set such that the short diagonal had a length of 1 mm and the long diagonal had a length of 2 mm. The material obtained showed no separations and cracks in the metal and was able to be used further at a rate of 100%.
  • Example 2 was repeated, and stretching was set such that the short diagonal had a length of 1.5 mm and the long diagonal had a length of 3 mm.
  • the product had cracks in the coating; it was flaked off in some areas.
  • the reject was about 25% of the area.
  • spheroidal graphite MCMB were mixed with 0.1 g of conductive carbon black (acetylene black), 0.2 g of polyvinylidene fluoride, copolymer (PVDF-HFP) and 2 g of acetone and processed into a uniformly dispersed paste in a cutting mixer.
  • This paste was subsequently applied to a glass plate to form a foil with a doctor plate.
  • the layer thickness of the dried layer was approx. 100 ⁇ m.
  • a cathode foil of equal size was prepared with the following composition: 3.6 g of LiCoO 2 were mixed with 0.2 g of conductive carbon black (acetylene black) and 0.2 g of PVDF as well as 4 g of acetone. Its layer thickness was likewise approx. 100 ⁇ m.
  • the electrode foils were laminated onto the particular collector grids in a roll type laminator.
  • the foils were preheated to 160° C. and then laminated under the roller with a pressing force of 236 kp.
  • the feed rate was 40 mm/sec.
  • Subsequent tape tests showed good adhesion of the particular foils to the corresponding collector grids.
  • the three elements namely, the anode with the copper collector grid, the cathode with the aluminum collector grid and the separator foil, were laminated together in a second lamination step.
  • the force was 16 kp, likewise at a lamination temperature of 160° C. and a feed rate of 20 mm/sec.
  • the design of the battery body is shown in FIGS. 1 and 2 .
  • FIG. 1 and 2 The design of the battery body is shown in FIGS. 1 and 2 .
  • FIG. 1 shows a cross section through a battery body, while FIG. 2 shows the top view of a battery body.
  • FIG. 1 shows the aluminum expanded metal ( 4 ) coated with adhesion promoter with the cathode foil ( 5 ) laminated to it and with the separator foil ( 6 ).
  • the counterelectrode consists of copper expanded metal ( 8 ) coated with adhesion promoter with the anode foil ( 7 ) laminated to it.
  • the aluminum expanded metal is seen in the top view in FIG. 4 .
  • Two contact tongues ( 9 ) for contacting the body after packaging in foil are led out to the side.
  • the battery was introduced into a plastic-coated aluminum foil such that electric contacts were able to be led to the outside from the current collectors.
  • a commercially available conducting salt solution LP30 was subsequently introduced into the laminated foil composite by absorption in a water-free protective gas atmosphere. The bag was then sealed hermetically. The battery was then formed and subsequently measured electrically. A good cycle life was found under a load with C rate. The curve is shown in FIG. 4 . More than 80% of the initial capacity was still present after 300 charge/discharge cycles.
  • the relative capacity of the battery was compared to that of a battery whose collector consisted of (error-free) coated expanded metal manufactured in the conventional manner. As is apparent from FIG. 5 , the performance data of the two batteries are essentially identical.
  • the process according to the present invention consequently leads to coatings of the same quality as in the case of expanded metals coated in the usual manner.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
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  • Dispersion Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • General Physics & Mathematics (AREA)
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  • Condensed Matter Physics & Semiconductors (AREA)
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  • Inorganic Chemistry (AREA)
  • Metallurgy (AREA)
  • Cell Electrode Carriers And Collectors (AREA)
  • Battery Electrode And Active Subsutance (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Secondary Cells (AREA)
  • Electrolytic Production Of Metals (AREA)
  • Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
  • External Artificial Organs (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)
  • Laminated Bodies (AREA)
US10/537,930 2002-12-06 2003-11-11 Method for producing drawn coated metals and use of said metals in the form of a current differentiator for electrochemical components Abandoned US20060137168A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10257186.4 2002-12-06
DE10257186A DE10257186A1 (de) 2002-12-06 2002-12-06 Verfahren zur Herstellung von beschichteten Streckmetallen und Verwendung solcher Metalle als Stromableiter in elektrotechnischen Bauelementen
PCT/EP2003/012596 WO2004053200A1 (de) 2002-12-06 2003-11-11 Verfahren zur herstellung von beschichteten streckmetallen und verwendung solcher metalle als stromableiter in elektrochemischen bauelementen

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WO2017091365A1 (en) * 2015-11-24 2017-06-01 3M Innovative Properties Company Unitary expanded metal mesh having linear down-roll strands
US10519667B1 (en) * 2016-01-25 2019-12-31 E-Z Products Llc Color-coated gutter cover of expanded metal and method of manufacture
WO2020210913A1 (en) * 2019-04-17 2020-10-22 2555663 Ontario Limited Lithium metal anode assemblies and an apparatus and method of making same
US12347852B2 (en) 2022-12-01 2025-07-01 Li-Metal Corp. Zinc alloy electrodes for lithium batteries

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WO2017091365A1 (en) * 2015-11-24 2017-06-01 3M Innovative Properties Company Unitary expanded metal mesh having linear down-roll strands
US10519667B1 (en) * 2016-01-25 2019-12-31 E-Z Products Llc Color-coated gutter cover of expanded metal and method of manufacture
WO2020210913A1 (en) * 2019-04-17 2020-10-22 2555663 Ontario Limited Lithium metal anode assemblies and an apparatus and method of making same
US12347852B2 (en) 2022-12-01 2025-07-01 Li-Metal Corp. Zinc alloy electrodes for lithium batteries

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TWI329375B (en) 2010-08-21
JP4996053B2 (ja) 2012-08-08
DE10257186A1 (de) 2004-07-15
DE50305143D1 (de) 2006-11-02
EP1570113A1 (de) 2005-09-07
WO2004053200A1 (de) 2004-06-24
EP1570113B1 (de) 2006-09-20
JP2006509334A (ja) 2006-03-16
CA2507399A1 (en) 2004-06-24
KR101084883B1 (ko) 2011-11-17
AU2003283389A1 (en) 2004-06-30
KR20050093769A (ko) 2005-09-23
TW200414581A (en) 2004-08-01
ATE340279T1 (de) 2006-10-15

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