# US 2017/0288232 A1 · High solids content paste formulations for secondary battery electrode > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2017/0288232 A1 - Document ID: US20170288232A1 - Status: Published application - Kind: A1 - Application number: 15/514,299 - Filed: 2015-09-25 - Published: 2017-10-05 - Earliest claimed: 2014-09-26 - Assignees: Applied Materials, Inc. - Applicants: Applied Materials, Inc. - Inventors: Subramanya P. HERLE - Web page: https://patentgrep.com/patent/US20170288232A1 ## CPC - H01M 4/622: {being polymers} - H01B 1/22: the conductive material comprising metals or alloys - H01M 4/139: Processes of manufacture - H01M 4/583: Carbonaceous material, e.g. graphite-intercalation compounds or CFx - H01M 4/625: {Carbon or graphite} - H01M 4/0414: {by screen printing} - Y02E 60/10: Energy storage using batteries - Y02P 70/50: Manufacturing or production processes characterised by the final manufactured product - H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY - 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}) - Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION - Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS ## Abstract A high solids content paste for fabrication of secondary battery electrodes may comprise: a negative active material or a positive active material; a binder; a solvent; and a hyperdispersant; wherein the high solids content paste has a specific viscosity chosen for a particular coating tool and a composition such that the high solids content paste will maintain a deposited shape after coating at least until the high solids content paste has dried and wherein the dry coating thickness is in the range of 5 microns to 300 microns. The high solids content paste with negative active material has a viscosity in the range of 30,000 cP to 45,000 cP and a corresponding density of 1.40 g/cc to 1.43 g/cc. The high solids content paste with positive active material has a viscosity in the range of 25,479 cP to 47,184 cP and a corresponding density of 2.72 g/cc to 2.73 g/cc. ## Claims ### Claim 1 A high solids content paste for fabrication of secondary battery electrodes, comprising: an active material chosen from the group consisting of a negative active material and a positive active material; a binder; a solvent; and a hyperdispersant; wherein said high solids content paste has a specific viscosity chosen for a particular coating tool and a composition such that said high solids content paste will maintain a deposited shape after coating at least until said high solids content paste has dried and wherein the dry coating thickness is in the range of 5 microns to 300 microns. ### Claim 2 (depends on 1) The high solids content paste of claim 1, wherein said active material is a negative active material comprising graphite particles. ### Claim 3 (depends on 2) The high solids content paste of claim 2, wherein said binder comprises at least one of carboxyl-methyl-cellulose, hydroxy-ethyl-cellulose, poly-methyl-methacrylate and poly-ethyl-methacrylate. ### Claim 4 (depends on 2) The high solids content paste of claim 2, wherein said solvent comprises water. ### Claim 5 (depends on 4) The high solids content paste of claim 4, wherein said high solids content paste has a viscosity in the range of 30,000 cP to 45,000 cP and a corresponding density of 1.40 g/cc to 1.43 g/cc. ### Claim 6 (depends on 1) The high solids content paste of claim 1, wherein said active material is positive active material. ### Claim 7 (depends on 6) The high solids content paste of claim 6, wherein said high solids content paste is formulated for use to form a sintered sheet comprising positive active material for use as a substrate for electrochemical energy storage device fabrication. ### Claim 8 (depends on 7) The high solids content paste of claim 7, wherein said sintered sheet of positive active material has a thickness in the range of 3 microns to 260 microns. ### Claim 9 (depends on 7) The high solids content paste of claim 7, wherein said sintered sheet of positive active material has a thickness in the range of 10 microns to 60 microns. ### Claim 10 (depends on 6) The high solids content paste of claim 6, wherein said solvent comprises an organic solvent. ### Claim 11 (depends on 6) The high solids content paste of claim 6, wherein said high solids content paste has a viscosity in the range of 25,479 cP to 47,184 cP and a corresponding density of 2.72 g/cc to 2.73 g/cc. ### Claim 12 (depends on 6) The high solids content paste of claim 6, further comprising carbon solids. ### Claim 13 A method of preparing a high solids content paste for fabrication of secondary battery electrodes, comprising: providing an active material chosen from the group consisting of a negative active material and a positive active material; wetting said active material to form wetted active material; providing a binder and a solvent; combining said binder with said solvent to form a viscous binder mixture; combining in a low shear mixer said wetted active material and said viscous binder mixture to form a paste; providing a hyperdispersant; and adding said hyperdispersant to said paste, to form said high solids content paste with a specific viscosity. ### Claim 14 A method of preparing a high solids content paste for fabrication of secondary battery electrodes, comprising: providing an active material chosen from the group consisting of a negative active material and a positive active material; solid phase mixing of said active material to form a solids mixture; providing a binder and a solvent; combining said solids mixture with said binder and said solvent to form a paste; providing a hyperdispersant; and adding said hyperdispersant to said paste, to form said high solids content paste with a specific viscosity. ### Claim 15 (depends on 14) The method of claim 14, further comprising providing carbon solids and solid phase mixing said carbon solids with said active material to form said solids mixture.