METHOD FOR PRODUCING SULFIDE SOLID ELECTROLYTE, SULFIDE SOLID ELECTROLYTE, ALL-SOLID-STATE BATTERY, AND METHOD FOR SELECTING RAW MATERIAL COMPOUND FOR USE IN PRODUCING SULFIDE SOLID ELECTROLYTE

摘要

A method for producing a sulfide solid electrolyte according to an embodiment of the present invention is a method for producing a sulfide solid electrolyte, including: preparing a composition containing P, S, N, an element A, and an element M; reacting the composition to obtain an intermediate; and heating the intermediate to obtain a sulfide solid electrolyte, where the composition includes a raw material compound containing N, the element A, and the element M. A represents at least one element selected from the group consisting of Li, Na, and K. M represents at least one element selected from the group consisting of Al, Ta, Si, Sc, Mg, Nb, B, Hf, C, P, Zr, and Ti.