# US 9,520,242 B2 · Electrical storage device electrode binder composition, electrical storage device electrode slurry, electrical storage device electrode, and electrical storage device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,520,242 B2 - Document ID: US9520242B2 - Status: Granted - Kind: B2 - Application number: 14/679,431 - Filed: 2015-04-06 - Published: 2015-07-30 - Granted: 2016-12-13 - Earliest claimed: 2011-08-30 - Assignees: Jsr Corporation - Applicants: Jsr Corporation - Inventors: Hironori Kitaguchi; Yoshiharu Otsuka; Nobuyuki Fujihara; Tatsuaki Honda - Web page: https://patentgrep.com/patent/US9520242B2 ## CPC - H01G 11/38: Carbon pastes or blends; Binders or additives therein - 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 11/30: characterised by their material - H01G 11/62: characterised by the solute, e.g. salts, anions or cations therein - H01M 4/13: Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof - H01M 4/139: Processes of manufacture - H01M 4/622: {being polymers} - H01M 4/623: {fluorinated polymers} - H01M 4/8828: {Coating with slurry or ink} - H01M 10/0525: Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries - Y02E 60/10: Energy storage using batteries - Y02E 60/13: Energy storage using capacitors - Y02E 60/50: Fuel cells - 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 An electrode binder composition that is used to produce an electrode used for an electrical storage device, includes (A) a polymer, (B) a carboxylic acid or a salt thereof, and (C) a liquid medium, and has a concentration of the carboxylic acid or a salt thereof (B) of 20 to 1000 ppm. ## Claims ### Claim 1 An electrical storage device electrode binder composition comprising (A) a polymer, (B) a carboxylic acid or a salt thereof, and (C) a liquid medium, the polymer (A) being diene polymer particles that comprise (a) a repeating unit derived from a conjugated diene compound, (b) a repeating unit derived from an aromatic vinyl compound, (c) a repeating unit derived from a (meth)acrylate compound, and (d) a repeating unit derived from an unsaturated carboxylic acid, and the binder composition having a concentration of the carboxylic acid or a salt thereof (B) of 20 to 1000 ppm, wherein the carboxylic acid or a salt thereof (B) is selected from the group consisting of acrylic acid, methacrylic acid, crotonic acid, maleic acid, fumaric acid, itaconic acid, malonic acid, citric acid, acetic acid, and salts thereof, and wherein the electrical storage device electrode binder composition is free of a fluoropolymer. ### Claim 2 (depends on 1) The electrical storage device electrode binder composition according to claim 1, wherein the diene polymer particles have only one endothermic peak within a temperature range of −50 to +5° C. when subjected differential scanning calorimetry (DSC) in accordance with JIS K 7121. ### Claim 3 (depends on 1) The electrical storage device electrode binder composition according to claim 1, wherein the diene polymer particles have a number average particle size of 50 to 400 nm. ### Claim 4 (depends on 1) An electrical storage device electrode slurry comprising the electrical storage device electrode binder composition according to claim 1, and an electrode active material. ### Claim 5 (depends on 4) An electrical storage device electrode comprising a collector, and a layer that is formed by applying the electrical storage device electrode slurry according to claim 4 to a surface of the collector, and drying the slurry. ### Claim 6 (depends on 5) An electrical storage device comprising the electrical storage device electrode according to claim 5. ### Claim 7 (depends on 1) The electrical storage device electrode binder composition according to claim 1, wherein the carboxylic acid or a salt thereof (B) is selected from the group consisting of acrylic acid, methacrylic acid, and salts thereof. ### Claim 8 (depends on 1) The electrical storage device electrode binder composition according to claim 1, wherein the conjugated diene compound comprises at least one member selected from the group consisting of 1,3-butadiene, 2-methyl-1,3-butadiene, 2,3-dimethyl-1,3-butadiene, 2-chloro-1,3-butadiene. ### Claim 9 (depends on 1) The electrical storage device electrode binder composition according to claim 1, wherein the conjugated diene compound is 1,3-butadiene. ### Claim 10 (depends on 1) The electrical storage device electrode binder composition according to claim 1, wherein the aromatic vinyl compound comprises at least one member selected from the group consisting of styrene, alpha-methylstyrene, p-methylstyrene, vinyltoluene, chlorostyrene, divinylbenzene. ### Claim 11 (depends on 1) The electrical storage device electrode binder composition according to claim 1, wherein the aromatic vinyl compound is styrene. ### Claim 12 (depends on 1) The electrical storage device electrode binder composition according to claim 1, wherein the (meth)acrylate compound comprises at least one member selected from the group consisting of methyl (meth)acrylate, ethyl (meth)acrylate, n-propyl (meth)acrylate, i-propyl (meth)acrylate, n-butyl (meth)acrylate, butyl (meth)acrylate, n-amyl (meth)acrylate, i-amyl (meth)acrylate, hexyl (meth)acrylate, cyclohexyl (meth)acrylate, 2-ethylhexyl (meth)acrylate, n-octyl (meth)acrylate, nonyl (meth)acrylate, decyl (meth)acrylate, hydroxymethyl (meth)acrylate, hydroxyethyl (meth)acrylate, ethylene glycol (meth)acrylate, ethylene glycol di(meth)acrylate, propylene glycol di(meth)acrylate, tri(meth)acrylate, pentaerythritol tetra(meth)acrylate, dipentaerythritol hexa(meth)acrylate, allyl (meth)acrylate, and ethylene di(meth)acrylate. ### Claim 13 (depends on 1) The electrical storage device electrode binder composition according to claim 1, wherein the (meth)acrylate compound comprises at least one member selected from the group consisting of methyl (meth)acrylate, ethyl (meth)acrylate, and 2-ethylhexyl (meth)acrylate. ### Claim 14 (depends on 1) The electrical storage device electrode binder composition according to claim 1, wherein the (meth)acrylate compound is methyl (meth)acrylate. ### Claim 15 (depends on 1) The electrical storage device electrode binder composition according to claim 1, which has a concentration of the carboxylic acid or a salt thereof (B) of 50 to 900 ppm. ### Claim 16 (depends on 1) The electrical storage device electrode binder composition according to claim 1, which has a concentration of the carboxylic acid or a salt thereof (B) of 100 to 800 ppm. ### Claim 17 (depends on 1) The electrical storage device electrode binder composition according to claim 1, wherein the liquid medium (C) is an aqueous medium. ### Claim 18 (depends on 1) The electrical storage device electrode binder composition according to claim 1, wherein the liquid medium (C) comprises at least one component selected from the group consisting of amide compounds, hydrocarbons, alcohols, ketones, esters, amine compounds, lactones, sulfoxides, and sulfone compounds. ### Claim 19 (depends on 1) The electrical storage device electrode binder composition according to claim 1, wherein the liquid medium (C) has a water content of at least 90 mass %. ### Claim 20 (depends on 1) The electrical storage device electrode binder composition according to claim 1, wherein the carboxylic acid or a salt thereof (B) comprises at least one of acrylic acid, itaconic acid and salts thereof.