# US 12,113,201 B2 · Method for manufacturing all-solid-state battery > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,113,201 B2 - Document ID: US12113201B2 - Status: Granted - Kind: B2 - Application number: 17/415,316 - Filed: 2019-12-27 - Published: 2022-03-03 - Granted: 2024-10-08 - Earliest claimed: 2019-01-09 - Assignees: Mtek-Smart Corporation - Applicants: Mtek-Smart Corporation - Inventors: Masafumi Matsunaga - Web page: https://patentgrep.com/patent/US12113201B2 ## CPC - H01M 4/139: Processes of manufacture - B05D 1/02: performed by spraying - B05D 1/36: Successively applying liquids or other fluent materials, e.g. without intermediate treatment - B05D 7/24: for applying particular liquids or other fluent materials - B05D 7/54: {No clear coat specified} - B05D 7/58: {No clear coat specified} - H01M 4/0404: {by coating on electrode collectors} - H01M 4/0419: {involving spraying} - H01M 4/366: {as layered products} - H01M 4/621: {Binders} - H01M 4/624: {Electric conductive fillers} - H01M 10/052: Li-accumulators - H01M 10/0562: Solid materials - H01M 10/0585: of accumulators having only flat construction elements, i.e. flat positive electrodes, flat negative electrodes and flat separators - B05D 3/12: by mechanical means - B05D 5/12: to obtain a coating with specific electrical properties - B05D 2202/00: Metallic substrate - B05D 2252/02: of indefinite length - H01M 2300/0068: inorganic - 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 - B05D: PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL (conveying articles or workpieces through baths of liquid B65G, e.g. B65G49/02) - 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-density layer can be formed and adherence increased by causing a slurry formed primarily from an electrode active material and a solvent and a slurry formed primarily from electrolyte particles and the solvent to alternately collide with a subject material with an impact force and to adhere and be layered thereon in thin film. A slurry formed primarily from a conductive additive and the solvent is separately created and is coated in a dispersed manner in a small quantity at a desired position. Carbon residue is eliminated or greatly reduced and battery performance improved by eliminating a binder or greatly reducing the binder content. ## Claims ### Claim 1 A method for manufacturing an all-solid-state battery by forming electrode layers on positive and negative current collectors for the all-solid-state battery, forming an electrolyte layer on at least one of the electrode layers, and sandwiching a positive electrode layer, the electrolyte layer, and a negative electrode layer between the positive current collector and the negative current collector and in contact with each other or sandwiching the electrolyte layer between the electrode layers to form a laminated structure, comprising: a preparing step; a lamination step; wherein in the preparing step, a slurry containing electrode active material and solvent, and a slurry containing electrolyte particles or electrolyte fibers and solvent are prepared, in the lamination step, at least two slurries are alternatively applied to the current collector in a film to stack each slurry so that two or more layers are formed, and a conductive agent is prepared so as to be contained in an independent slurry and applied on the electrolyte particles or fibers or on the electrode active material in a state where particles or fibers of the conductive agent are dispersed so that the particles or the fibers of the conductive agent do not form a film. ### Claim 2 (depends on 1) The method of claim 1, wherein 2 to 15 layers are formed in the lamination step. ### Claim 3 (depends on 1) The method of claim 1, wherein one of the slurries is a slurry for the positive electrode layer, and the slurry for the positive electrode layer contains a conductive agent. ### Claim 4 (depends on 1) The method of claim 1, wherein the slurry containing electrode active material and solvent, and/or the slurry containing electrolyte particles or electrolyte fibers and solvent contain an inorganic or organic binder. ### Claim 5 (depends on 1) The method of claim 1, wherein the electrolyte layer is formed by laminating and applying the electrolyte layer slurry on the positive electrode layer or the negative electrode layer formed as the electrode or on a porous sheet for the electrolyte in a thin film. ### Claim 6 (depends on 1) The method of claim 1, wherein at least one of the electrode and electrolyte layer is formed by a spray method or the electrode or electrolyte layer is formed by converting the slurry into particles, and moving and applying the slurry in a particulate form on a heated collector, electrode layer, and porous sheet of the object to be applied, and then volatilizing 95 percent or more of the solvent within five seconds after splayed particles or particles of the slurry adhere to the object. ### Claim 7 (depends on 6) The method of claim 6, wherein spraying is done in pulses of 1 to 1000 Hz, the distance between the object and spray head is 5 to 60 mm, and impact of the spray particles of the slurry on the object causes the solvent to evaporate while the solvent and non-volatile components in the slurry are instantaneously separated. ### Claim 8 (depends on 1) The method of claim 1, further comprising: forming a negative electrode on the negative current collector; and forming a positive electrode on the positive current collector. ### Claim 9 (depends on 8) The method of claim 8, wherein the all-solid-state battery is manufactured in a roll-to-roll manner. ### Claim 10 (depends on 8) The method of claim 8, further comprising: forming the electrolyte layer on the negative electrode or the positive electrode. ### Claim 11 (depends on 1) The method of claim 1, further comprising: forming the electrolyte layer with a porous base material as a backbone to laminate the electrolyte layer between the negative electrode layer and the positive electrode layer.