# US 2013/0157129 A1 · Coating liquid, conductive coating film, electrode plate for electricity storage device, and electricity storage device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2013/0157129 A1 - Document ID: US20130157129A1 - Status: Published application - Kind: A1 - Application number: 13/767,174 - Filed: 2013-02-14 - Published: 2013-06-20 - Earliest claimed: 2010-08-31 - Assignees: Dainichiseika Color & Chemicals Mfg. Co., Ltd.; Kyoritsu Chemical & Co., Ltd. - Inventors: Taichi UEMURA; Nobuyuki KOBAYASHI; Takanori SANNAN; Shinya TSUCHIDA; Seiji DOI; Yosuke ICHINOMIYA; Yoshihiko IIJIMA - Web page: https://patentgrep.com/patent/US20130157129A1 ## CPC - C09D 5/24: Electrically-conducting paints {(conductive materials H01B1/00)} - H01B 1/122: {Ionic conductors} - H01G 11/04: Hybrid capacitors - H01G 11/28: arranged or disposed on a current collector; Layers or phases between electrodes and current collectors, e.g. adhesives - H01G 11/32: Carbon-based - H01G 11/68: characterised by their material - H01G 11/74: Terminals, e.g. extensions of current collectors - H01M 4/62: Selection of inactive substances as ingredients for active masses, e.g. binders, fillers - H01M 4/622: {being polymers} - H01M 4/667: {in the form of layers, e.g. coatings} - H01M 4/668: {Composites of electroconductive material and synthetic resins} - Y02E 60/10: Energy storage using batteries - Y02E 60/13: Energy storage using capacitors - C09D: COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR (cosmetics A61K; processes for applying liquids or other fluent materials to surfaces, in general, B05D; staining wood B27K5/02; glazes or vitreous enamels C03C; natural resins, French polish, drying-oils, driers, turpentine, per se, C09F; polishing compositions other than French polish, ski waxes C09G; adhesives or use of materials as adhesives C09J; materials for sealing or packing joints or covers C09K3/10; materials for stopping leaks C09K3/12; processes for the electrolytic or electrophoretic production of coatings C25D) - H01B: CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES (selection for magnetic properties H01F1/00; waveguides H01P {; printed circuits H05K}) - H01G: CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE (selection of specified materials as dielectric H01B3/00; capacitors having potential barriers H10D1/62, H10K10/10) - H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY - Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION ## Abstract Disclosed is a coating formulation useful in forming a conductive coating film on a surface of a collector for constructing an electrode plate for an electricity storage device. The coating formulation contains (A) a polymeric acid, (B) a vinyl carboxylate copolymer represented by the following formula (1): wherein R1 is selected from the group consisting of H, Na, organic groups derived from vinyl carboxylate monomers, and cations capable of forming electrolytes for the electricity storage device, R2 to R4 are independently selected from the group consisting of H, Na, C1-C6 alkyl groups, and cations capable of forming electrolytes for the electricity storage device, and a ratio (m/n) of m to n is from 0.0001 to 1, (C) a conductive material, and (D) a polar solvent. ## Claims ### Claim 1 A coating formulation useful in forming a conductive coating film on a surface of a collector for constructing an electrode plate for an electricity storage device, comprising: (A) a polymeric acid, (B) a vinyl carboxylate copolymer represented by the following formula (1): wherein R1 is selected from the group consisting of H, Na, organic groups derived from vinyl carboxylate monomers, and cations capable of forming electrolytes for the electricity storage device, R2 to R4 are independently selected from the group consisting of H, Na, C1-C6 alkyl groups, and cations capable of forming electrolytes for the electricity storage device, and a ratio (m/n) of m to n is from 0.0001 to 1, (C) a conductive material, and (D) a polar solvent. ### Claim 2 (depends on 1) The coating formulation according to claim 1, wherein the cation is a lithium or tetraalkylammonium ion. ### Claim 3 (depends on 1) The coating formulation according to claim 1, further comprising a titanium-based coupling agent and/or a silane coupling agent. ### Claim 4 (depends on 1) The coating formulation according to claim 1, wherein the polymeric acid comprises at least one polymeric acid selected from the group consisting of polyacrylic acid, polyitaconic acid, and polymaleic acid. ### Claim 5 (depends on 1) The coating formulation according to claim 1, wherein the conductive material comprises at least one conductive material selected from the group consisting of acetylene black, Ketjenblack, graphite, furnace black, monolayer and multilayer carbon nanofibers, and monolayer and multilayer carbon nanotubes. ### Claim 6 (depends on 1) The coating formulation according to claim 1, wherein: a content of the polymeric acid per part by mass of the conductive material is from 0.1 to 3 parts by mass, a content of the vinyl carboxylate copolymer per part by mass of the conductive material is from 0.1 to 3 parts by mass, and a solids concentration is from 0.02 to 40 mass %. ### Claim 7 (depends on 1) The coating formulation according to claim 1, wherein: a content of the vinyl carboxylate copolymer per part by mass of the polymeric acid is from 0.1 to 1 parts by mass. ### Claim 8 (depends on 1) The coating formulation according to claim 1, further comprising a crosslinking agent. ### Claim 9 (depends on 1) A conductive coating film formed from the coating formulation according to claim 1. ### Claim 10 (depends on 9) The conductive coating film according to claim 9, wherein the film formed from the coating formulation has been formed through heat treatment at from 80 to 250° C., and has a dry film thickness of from 0.1 to 10 μm. ### Claim 11 (depends on 9) The conductive coating film according to claim 9, which has a surface resistivity of not higher than 3,000 Ω/□ as measured following JIS K 7194 when formed with a dry film thickness of 4 μm on a glass plate. ### Claim 12 (depends on 9) A member for an electrode plate, comprising a collector and the conductive coating film according to claim 9 as arranged on a surface of the collector. ### Claim 13 (depends on 12) An electrode plate for an electricity storage device, comprising the member according to claim 12 and an electrode active material layer arranged on a surface of the conductive coating film. ### Claim 14 (depends on 13) The electrode plate according to claim 13, wherein the collector is an aluminum foil, and a positive-electrode active material is contained in the electrode active material layer. ### Claim 15 (depends on 13) The electrode plate according to claim 13, wherein the collector is a copper foil, and a negative-electrode active material is contained in the electrode active material layer. ### Claim 16 (depends on 13) The electrode plate according to claim 13, wherein the collector is an aluminum foil, and the electrode plate is a polarizable electrode plate. ### Claim 17 (depends on 1) A process for producing an electrode plate for an electricity storage device, comprising the following steps: applying the coating formulation according to any claim 1 onto a surface of a collector to form a conductive coating film, and forming an electrode active material layer on a surface of the conductive coating film. ### Claim 18 (depends on 17) The process according to claim 17, wherein after applying the coating formulation onto the surface of the collector, the polar solvent contained in the coating formulation is removed under heat or heat treatment is conducted at from 80 to 250° C. for from 1 second to 60 minutes while removing the polar solvent. ### Claim 19 (depends on 13) An electricity storage device comprising the electrode plate according to claim 13. ### Claim 20 (depends on 19) The electricity storage device according to claim 19, which is a secondary cell or a capacitor.