# US 9,520,596 B2 · Resin for negative electrode of lithium ion battery, resin composition, slurry, negative electrode, 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 9,520,596 B2 - Document ID: US9520596B2 - Status: Granted - Kind: B2 - Application number: 14/475,588 - Filed: 2014-09-03 - Published: 2015-10-08 - Granted: 2016-12-13 - Earliest claimed: 2014-04-08 - Assignees: Chi Mei Corporation - Applicants: Chi Mei Corporation - Inventors: Hsiu-Mei Wu; Chan-Li Hsueh; Chung-Ping Li - Web page: https://patentgrep.com/patent/US9520596B2 ## CPC - H01M 4/622: {being polymers} - C08F 220/14: Methyl esters {, e.g. methyl (meth)acrylate} - C08F 220/1804: {C4-(meth)acrylate, e.g. butyl (meth)acrylate, isobutyl (meth)acrylate or tert-butyl (meth)acrylate} - C08F 291/00: Macromolecular compounds obtained by polymerising monomers on to macromolecular compounds according to more than one of the groups C08F251/00 - C08F289/00 - C09D 133/08: Homopolymers or copolymers of acrylic acid esters - C09D 133/12: Homopolymers or copolymers of methyl methacrylate - H01M 4/133: Electrodes based on carbonaceous material, e.g. graphite-intercalation compounds or CFx - C08F 220/1808: {C8-(meth)acrylate, e.g. isooctyl (meth)acrylate or 2-ethylhexyl (meth)acrylate} - C08F 257/02: on to polymers of styrene or alkyl-substituted styrenes - C08F 297/02: using a catalyst of the anionic type - Y02E 60/10: Energy storage using batteries - H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY - C08F: MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS - 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) - Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION ## Abstract A resin for a negative electrode of a lithium ion battery including a core section and a cladding layer covering the surface of the core section are provided. The cladding layer is obtained by reacting a first monomer mixture. The first monomer mixture includes an ethylenically unsaturated carboxylic acid ester monomer, a first aromatic vinyl monomer, and an ethylenically unsaturated carboxylic acid monomer. Based on 100 wt % of the first monomer mixture, a content of the ethylenically unsaturated carboxylic acid ester monomer is from 45 to 80 wt %, a content of the first aromatic vinyl monomer is from 5 to 25 wt %, and a content of the ethylenically unsaturated carboxylic acid monomer is from 10 to 43 wt %. ## Claims ### Claim 1 A resin, comprising: a core section; and a cladding layer covering a surface of the core section, wherein the cladding layer is obtained by reacting a first monomer mixture, the first monomer mixture comprises an ethylenically unsaturated carboxylic acid ester monomer, a first aromatic vinyl monomer, and an ethylenically unsaturated carboxylic acid monomer, based on 100 wt % of the first monomer mixture, a content of the ethylenically unsaturated carboxylic acid ester monomer is from 45 to 80 wt %, a content of the first aromatic vinyl monomer is from 5 to 25 wt %, and a content of the ethylenically unsaturated carboxylic acid monomer is from 10 to 43 wt %. ### Claim 2 (depends on 1) The resin of claim 1, wherein the content of the ethylenically unsaturated carboxylic acid ester monomer is from 55 to 75 wt %. ### Claim 3 (depends on 1) The resin of claim 1, wherein the content of the first aromatic vinyl monomer is from 5 to 20 wt %. ### Claim 4 (depends on 1) The resin of claim 1, wherein the content of the ethylenically unsaturated carboxylic acid monomer is from 10 to 30 wt %. ### Claim 5 (depends on 1) The resin of claim 1, wherein based on 100 parts by weight of the resin, a content of the core section is from 70 to 80 parts by weight and a content of the cladding layer is from 20 to 30 parts by weight. ### Claim 6 (depends on 1) The resin of claim 1, wherein the core section is obtained by reacting a second monomer mixture, the second monomer mixture comprises a second aromatic vinyl monomer, a conjugated diene monomer, and a vinyl cyanide monomer, based on 100 wt % of the second monomer mixture, a content of the second aromatic vinyl monomer is from 40 to 50 wt %, a content of the conjugated diene monomer is from 45 to 55 wt %, and a content of the vinyl cyanide monomer is from 2 to 10 wt %. ### Claim 7 (depends on 1) A resin composition, comprising: the resin of claim 1; and a solvent. ### Claim 8 (depends on 7) A slurry, comprising: the resin composition of claim 7; and an active substance. ### Claim 9 (depends on 8) The slurry of claim 8, wherein the active substance comprises a conductive carbon material for a negative electrode of a lithium ion battery. ### Claim 10 (depends on 8) A negative electrode, comprising: a current collector; and a negative electrode layer located on a surface of the current collector and formed by processing steps of the slurry of claim 8. ### Claim 11 (depends on 10) A lithium ion battery, comprising: a positive electrode; the negative electrode of claim 10 separately disposed from the positive electrode; an electrolyte located between the positive electrode and the negative electrode; and a package structure covering the positive electrode, the negative electrode, and the electrolyte.