Method for producing sulfide solid electrolyte material

Abstract

A method for producing a sulfide solid electrolyte material, which is configured to allow the crystallization of a sulfide glass at low temperature. Provided is a method for producing a sulfide solid electrolyte material, the method comprising: amorphizing a raw material composition containing Li2S, P2S5, LiI, LiBr, a potassium-containing compound and Li3N to obtain a sulfide glass, and crystallizing the sulfide glass by hot-pressing the sulfide glass, wherein, when a first crystallization temperature of the sulfide glass is determined as X, and a second crystallization temperature of the sulfide glass is determined as Y, the first crystallization temperature X of the sulfide glass is 171° C. or less, and a temperature difference (Y−X) between the second crystallization temperature Y and the first crystallization temperature X is 75° C. or more.

Dependencies are inferred from the claim text.