Sulfide solid electrolyte material, lithium solid battery and method of preparing sulfide solid electrolyte material

摘要

A method for preparing a sulfide solid electrolyte material exhibiting Li ion conductivity. The sulfide solid electrolyte material contains an organic compound having a molecular weight within a range of 30 to 300, and the organic compound is present in an amount of 0.8 wt % or less. The method includes: (i) performing mechanical milling to a mixture of a raw material composition and the organic compound to convert the raw material composition to an amorphous state, thereby synthesizing a sulfide glass; and (ii) drying the sulfide glass such that at least some of the organic compound remains in the sulfide solid electrolyte material.