SULFIDE-BASED SOLID ELECTROLYTE, METHOD FOR PREPARING SULFIDE-BASED SOLID ELECTROLYTE, AND ALL-SOLID BATTERY COMPRISING SULFIDE-BASED SOLID ELECTROLYTE

Japanese Patent JP2023181158

A

To provide: a sulfide-based solid electrolyte having improved ionic conductivity; a method for preparing the sulfide-based solid electrolyte; and an all-solid battery comprising the sulfide-based solid electrolyte.SOLUTION: The present invention provides a sulfide-based solid electrolyte containing a Group 12 element and having an argyrodite-type crystal structure. The sulfide-based solid electrolyte is represented by a chemical formula Li7-x-2yMyPS6-xHax. In the chemical formula, the M is at least one element selected from the Group 12 elements, Ha is at least one element selected from the halogen elements, and x and y satisfy 1.0