# US 12,119,442 B2 · Method for producing sulfide solid electrolyte > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,119,442 B2 - Document ID: US12119442B2 - Status: Granted - Kind: B2 - Application number: 17/317,951 - Filed: 2021-05-12 - Published: 2021-12-30 - Granted: 2024-10-15 - Earliest claimed: 2020-05-13 - Assignees: Idemitsu Kosan Co., Ltd. - Applicants: Idemitsu Kosan Co., Ltd. - Inventors: Fumio Yamakawa; Masao Aida; Yusuke Iseki; Hiroaki Yamada; Shinji Tanaka - Web page: https://patentgrep.com/patent/US12119442B2 ## CPC - H01M 10/0562: Solid materials - C01B 17/22: Alkali metal sulfides or polysulfides - C01B 25/14: Sulfur, selenium, or tellurium compounds of phosphorus - H01B 1/06: mainly consisting of other non-metallic substances - H01B 13/00: Apparatus or processes specially adapted for manufacturing conductors or cables - C01P 2002/54: one element only - C01P 2002/72: by d-values or two theta-values, e.g. as X-ray diagram - C01P 2002/82: by IR- or Raman-data - C01P 2006/40: Electric properties - H01M 2300/0068: inorganic - Y02E 60/10: Energy storage using batteries - H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY - C01B: NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; {METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C} - 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}) - C01P: INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS - Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION ## Abstract [Problem] To provide a method for efficiently producing a sulfide solid electrolyte using a liquid-phase method. [Solution to Problem] A method for producing a sulfide solid electrolyte not using a pulverizer in reacting raw materials, wherein a raw material that contains lithium sulfide, a phosphorus compound and a halogen compound, and a complexing agent are stirred in a reactor while a fluid that contains the contents in the reactor is discharged outside the reactor through a discharging port arranged in the reactor and the fluid that contains the discharged contents is returned back to the reactor through a returning port arranged in the reactor to thereby make the contents-containing fluid circulate therethrough. ## Claims ### Claim 1 A method for producing a sulfide solid electrolyte, comprising: stirring a reaction fluid in a reactor; and circulating the reaction fluid out of the reactor via a discharging port, through a circulation line, and back into the reactor via a returning port during stirring; wherein: the reaction fluid is obtained by combining a raw material and a complexing agent; the raw material comprises lithium sulfide, a phosphorus compound, and a halogen compound; the complexing agent contains a nitrogen atom; and the circulation line is not provided with a pulverizer, and a pulverizer is not used in stirring and circulating the reaction fluid. ### Claim 2 (depends on 1) The method for producing a sulfide solid electrolyte according to claim 1, wherein the raw material contains two or more kinds of solid compounds, and the density difference between the compound having a highest density and the compound having a lowest density is 1.0 g/cm3 or more. ### Claim 3 (depends on 1) The method for producing a sulfide solid electrolyte according to claim 1, wherein a circulation amount per minute of the reaction fluid is 0.01 times or more and 5.0 times or less a volume of the reaction fluid in the reactor. ### Claim 4 (depends on 1) The method for producing a sulfide solid electrolyte according to claim 1, wherein a volume of the reactor is 30 L or more. ### Claim 5 (depends on 3) The method for producing a sulfide solid electrolyte according to claim 3, wherein the circulation amount per minute of the reaction fluid is 3.5 L/min or more and 100 L/min or less. ### Claim 6 (depends on 1) The method for producing a sulfide solid electrolyte according to claim 1, wherein the reaction fluid is not subjected to a pulverizing step. ### Claim 7 (depends on 1) The method for producing a sulfide solid electrolyte according to claim 1, wherein the discharging port is arranged at a bottom of the reactor. ### Claim 8 (depends on 1) The method for producing a sulfide solid electrolyte according to claim 1, wherein the returning port is below a top surface of the reaction fluid in the reactor during operation. ### Claim 9 (depends on 1) The method for producing a sulfide solid electrolyte according to claim 1, wherein a temperature in the reactor is controlled. ### Claim 10 (depends on 1) The method for producing a sulfide solid electrolyte according to claim 1, wherein one or more selected from lithium bromide (LiBr), lithium iodide (LiI) and lithium chloride (LiCl) are used as the halogen compound. ### Claim 11 (depends on 1) The method for producing a sulfide solid electrolyte according to claim 1, wherein one or more selected from bromine (Br2) and iodine (I2) are used as the halogen compound. ### Claim 12 (depends on 1) The method for producing a sulfide solid electrolyte according to claim 1, wherein the complexing agent has two or more amino groups. ### Claim 13 (depends on 1) The method for producing a sulfide solid electrolyte according to claim 1, wherein the complexing agent is tetramethylethylenediamine. ### Claim 14 A method for producing a sulfide solid electrolyte, comprising: stirring a reaction fluid in a reactor; and circulating the reaction fluid out of the reactor via a discharging port, through a circulation line, and back into the reactor via a returning port during stirring; wherein: the reaction fluid is obtained by combining a raw material and a complexing agent that reacts with the raw material to form a complex; the raw material comprises lithium sulfide, a phosphorus compound, and a halogen compound; and the circulation line is not provided with a pulverizer, and a pulverizer is not used in stirring and circulating the reaction fluid.