# US 2014/0154563 A1 · Composite particles for positive electrode of electrochemical element, electrochemical element, and method for producing composite particles for positive electrode of electrochemical element > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0154563 A1 - Document ID: US20140154563A1 - Status: Published application - Kind: A1 - Application number: 14/096,146 - Filed: 2013-12-04 - Published: 2014-06-05 - Earliest claimed: 2012-12-05 - Assignees: Zeon Corporation - Applicants: Zeon Corporation - Inventors: Hiroki OGURO - Web page: https://patentgrep.com/patent/US20140154563A1 ## CPC - H01M 4/131: Electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx - H01M 4/366: {as layered products} - H01M 4/62: Selection of inactive substances as ingredients for active masses, e.g. binders, fillers - 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 - Y02E 60/10: Energy storage using batteries - 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 Composite particles for a positive electrode of an electrochemical element include a conductive material, a Ni containing positive electrode active material, a water soluble resin including a monomeric unit containing an acidic functional group, and a granular binder resin. The content of the water soluble resin is 1 to 10 parts by mass per 100 parts by mass of the Ni containing positive electrode active material. An electrochemical element includes a collector and a positive electrode active material layer obtained by formation with the composite particles. Furthermore, a method for producing the composite particles includes drying and granulating an aqueous slurry composition including the above components in order to obtain the composite particles. The content in the slurry composition of the water soluble resin is 1 to 10 parts by mass per 100 parts by mass of the Ni containing positive electrode active material. ## Claims ### Claim 1 Composite particles for a positive electrode of an electrochemical element, comprising: a conductive material, a Ni containing positive electrode active material, a water soluble resin including a monomeric unit containing an acidic functional group, and a granular binder resin, wherein a content of the water soluble resin including a monomeric unit containing an acidic functional group is 1 to 10 parts by mass per 100 parts by mass of the Ni containing positive electrode active material. ### Claim 2 (depends on 1) The composite particles for a positive electrode of an electrochemical element according to claim 1, wherein the Ni containing positive electrode active material is coated with a coating material including a conductive material and a coating resin. ### Claim 3 (depends on 2) The composite particles for a positive electrode of an electrochemical element according to claim 2, wherein an SP value of the coating resin is from 9.5 to 13 (cal/cm3)1/2. ### Claim 4 (depends on 1) The composite particles for a positive electrode of an electrochemical element according to claim 1, wherein the Ni containing positive electrode active material is a Li2MnO3—LiNiO2 based solid solution positive electrode active material. ### Claim 5 (depends on 1) The composite particles for a positive electrode of an electrochemical element according to claim 1, wherein the water soluble resin including a monomeric unit containing an acidic functional group includes at least one selected from the group consisting of a monomeric unit containing a sulfonic acid group, a monomeric unit containing a carboxyl group, and a monomeric unit containing a phosphoric acid group. ### Claim 6 (depends on 1) The composite particles for a positive electrode of an electrochemical element according to claim 1, wherein the granular binder resin includes a monomeric unit of (meth)acrylic acid ester with a carbon number of 6 to 15, an α,β-unsaturated nitrile monomeric unit, and a monomeric unit containing a carboxylic acid group. ### Claim 7 (depends on 1) The composite particles for a positive electrode of an electrochemical element according to claim 1, wherein the granular binder resin includes a monomeric unit of dibasic acid. ### Claim 8 (depends on 1) An electrochemical element comprising a positive electrode including a collector and a positive electrode active material layer obtained by formation with the composite particles for a positive electrode of an electrochemical element according to claim 1. ### Claim 9 A method for producing composite particles for a positive electrode of an electrochemical element, comprising: drying and granulating an aqueous slurry composition including a conductive material, a Ni containing positive electrode active material, a water soluble resin including a monomeric unit containing an acidic functional group, and a granular binder resin to obtain composite particles, wherein a content in the slurry composition of the water soluble resin including a monomeric unit containing an acidic functional group is 1 to 10 parts by mass per 100 parts by mass of the Ni containing positive electrode active material. ### Claim 10 (depends on 9) The method for producing composite particles for a positive electrode of an electrochemical element according to claim 9, wherein the water soluble resin including a monomeric unit containing an acidic functional group is formed as an ammonium salt by at least one selected from the group consisting of ammonia and an amine compound with a molecular weight of at most 1000. ### Claim 11 (depends on 9) The method for producing composite particles for a positive electrode of an electrochemical element according to claim 9, wherein the Ni containing positive electrode active material is coated with a coating material including a conductive material and a coating resin. ### Claim 12 (depends on 11) The method for producing composite particles for a positive electrode of an electrochemical element according to claim 11, wherein an SP value of the coating resin is from 9.5 to 13 (cal/cm3)1/2. ### Claim 13 (depends on 9) The method for producing composite particles for a positive electrode of an electrochemical element according to claim 9, wherein the Ni containing positive electrode active material is a Li2MnO3—LiNiO2 based solid solution positive electrode active material.