Abstract: A main object of the present invention is to provide a method for producing sulfide solid electrolytes, by which sulfide solid electrolytes whose productivity, recovery rate, and ionic conductivity are improved can be produced. The method of the present invention includes the steps of: pulverizing a mixture that is obtained by mixing a sulfide solid electrolyte containing sulfides and a single type of halides or a raw material thereof, an ether compound, and a solvent to obtain a pulverized product; and carrying out heating treatment wherein the obtained pulverized product is heated to obtain a crystallized sulfide solid electrolyte, wherein formulas “0.44?C/(A+B+C)?0.70” and “0.10?B/(A+B+C)?0.36” are satisfied, where “A [g]” denotes a weight of the sulfide solid electrolyte or the raw material thereof, “B [g]” denotes a weight of the ether compound, and “C [g]” denotes a weight of the solvent.

Abstract: A method for manufacturing a sulfide solid electrolyte can prevent deterioration of the sulfide solid electrolyte and can improve the lithium ion conductivity. In a step of crystallizing the sulfide solid electrolyte with heat treatment, the ambient concentration of oxygen containing organic compounds is no more than 100 ppm.

Abstract: A main object of the present invention is to provide a method for producing sulfide solid electrolytes, by which sulfide solid electrolytes whose productivity, recovery rate, and ionic conductivity are improved can be produced. The method of the present invention includes the steps of: pulverizing a mixture that is obtained by mixing a sulfide solid electrolyte containing sulfides and a single type of halides or a raw material thereof, an ether compound, and a solvent to obtain a pulverized product; and carrying out heating treatment wherein the obtained pulverized product is heated to obtain a crystallized sulfide solid electrolyte, wherein formulas “0.44?C/(A+B+C)?0.70” and “0.10?B/(A+B+C)?0.36” are satisfied, where “A [g]” denotes a weight of the sulfide solid electrolyte or the raw material thereof, “B [g]” denotes a weight of the ether compound, and “C [g]” denotes a weight of the solvent.