| abstract |
A main object of the present invention is to provide a method for producing a sulfide solid electrolyte material that generates very little hydrogen sulfide. The invention relates, Li 2 S, and the Group 14 or sulfide of a Group 15 element, the ratio of Li 2 S to the sum of both, is less than the rate of obtaining ortho-composition Li 2 S The first vitrification step of forming an intermediate body having no cross-linked sulfur without Li 2 S by vitrifying the raw material composition formed by mixing in the first vitrification process, and the intermediate body And a second vitrification step for eliminating the cross-linked sulfur by vitrifying the intermediate-containing composition formed by mixing a bond-breaking compound that cleaves the cross-linked sulfur bond with a second vitrification treatment. The above-mentioned problems are solved by providing a method for producing a sulfide solid electrolyte material characterized by comprising: [Selection] Figure 1 |