Sulfide solid electrolyte, and preparation method and use thereof

Abstract

Provided are a sulfide solid electrolyte, and a preparation method and use thereof. The sulfide solid electrolyte has a chemical composition formula of Li6P1-a(M)aS5X (where M is one or more selected from the group consisting of V, Nb, and Ta, and X is one or more selected from the group consisting of F, Cl, and Br). The preparation method includes: weighing raw materials of a Li source, a P source, an S source, an M source, and an X source, and mixing to be uniform to obtain a mixture, and subjecting the mixture to ball milling to obtain a precursor powder of the sulfide solid electrolyte; sieving the precursor powder to obtain a sieved powder, and then pressing the sieved powder into a solid sheet; and subjecting the solid sheet to vacuum high-temperature sintering to obtain the sulfide solid electrolyte.

Dependencies are inferred from the claim text.