# US 11,028,209 B2 · Conductive resin composition for electrodes, electrode composition, electrode using same and lithium ion battery > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,028,209 B2 - Document ID: US11028209B2 - Status: Granted - Kind: B2 - Application number: 16/320,646 - Filed: 2017-07-14 - Published: 2019-08-15 - Granted: 2021-06-08 - Earliest claimed: 2016-07-28 - Assignees: Denka Company Limited - Applicants: Denka Company Limited - Inventors: Tatsuya Nagai; Takuya Narutomi; Tetsuya Ito; Hiroshi Yokota - Web page: https://patentgrep.com/patent/US11028209B2 ## CPC - C08F 261/04: on to polymers of vinyl alcohol - C08F 20/44: Acrylonitrile - C08K 3/04: Carbon - C08L 27/16: Homopolymers or copolymers or vinylidene fluoride - H01M 4/1391: of electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx - H01M 4/505: of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy - H01M 4/525: of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy - H01M 4/5825: {Oxygenated metallic salts or polyanionic structures, e.g. borates, phosphates, silicates, olivines} - H01M 4/62: Selection of inactive substances as ingredients for active masses, e.g. binders, fillers - H01M 4/623: {fluorinated polymers} - H01M 4/625: {Carbon or graphite} - H01M 10/0525: Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries - C08K 2201/001: Conductive additives - C08L 2203/20: use in electrical or conductive gadgets - Y02E 60/10: Energy storage using batteries - C08F: MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS - C08K: Use of inorganic or non-macromolecular organic substances as compounding ingredients (paints, inks, varnishes, dyes, polishes, adhesives C09) - C08L: COMPOSITIONS OF MACROMOLECULAR COMPOUNDS (compositions based on polymerisable monomers C08F, C08G; artificial filaments or fibres D01F; textile treating compositions D06) - 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 [Problem] To provide a conductive resin composition for electrodes which is excellent in dispersibility and oxidation resistance. To provide: an electrode composition employing the conductive resin composition for electrodes and having a low viscosity; an electrode employing the electrode composition and having a low electrode plate resistance; and a lithium ion battery having a high energy density, high output characteristics and a high cyclability. [Solution] A conductive resin composition for electrodes, comprising a dispersant, a conductive agent, and a binding material, wherein: the dispersant comprises a graft copolymer in which a monomer containing acrylonitrile as a main component is grafted onto polyvinyl alcohol; the average degree of polymerization of the polyvinyl alcohol is 300 to 3,000 and the degree of saponification of the same is 90 mol % to 100 mol %; and the polyvinyl alcohol content and the polyacrylonitrile content in the graft copolymer are, respectively, 10 mass % to 40 mass % and 90 mass % to 60 mass %. ## Claims ### Claim 1 A conductive resin composition for electrodes, comprising a dispersant, a conductive agent, and a binding material, wherein: the dispersant comprises a graft copolymer in which a monomer containing acrylonitrile as a main component is grafted onto polyvinyl alcohol; the average degree of polymerization of the polyvinyl alcohol is 300 to 3,000, and the degree of saponification of the same is 90 mol % to 100 mol %; and the polyvinyl alcohol content and the polyacrylonitrile content in the graft copolymer are, respectively, 10 mass % to 40 mass % and 90 mass % to 60 mass %, wherein the conductive resin composition has a viscosity, measured at a shear velocity of 0.1 s−1, of 11 Pa·s or less. ### Claim 2 (depends on 1) The conductive resin composition for electrodes according to claim 1, wherein the mass ratio of the dispersant to the conductive agent (mass of the dispersant/mass of the conductive agent) is 0.01 to 1. ### Claim 3 (depends on 1) The conductive resin composition for electrodes according to claim 1, wherein the binding material comprises polyvinylidene fluoride. ### Claim 4 (depends on 1) The conductive resin composition for electrodes according to claim 1, wherein the conductive agent comprises at least one selected from the group consisting of (i) a fibrous carbon, (ii) a spherical carbon, and (iii) a carbon composite in which a fibrous carbon and a spherical carbon are interconnected. ### Claim 5 (depends on 1) An electrode composition comprising the conductive resin composition for electrodes according to claim 1 and an active material. ### Claim 6 (depends on 5) The electrode composition according to claim 5, wherein the active material is at least one selected from LiCoO2, LiMn2O4, LiNiO2, LiMPO4, Li2MSiO4, LiNiXMn(2−X)O4, Li(MnXNiYCoZ)O2, Li(AlXNiYCoZ)O2, and xLi2MnO3-(1−x)LiMO2, wherein X in LiNiXMn(2−x)O4 satisfies the relation 0