Sulfide-based solid electrolyte powder, method for producing sulfide-based solid electrolyte powder, sulfide-based solid electrolyte layer, and lithium ion secondary battery

Abstract

A sulfide-based solid electrolyte powder emits photo-luminescence light between a wavelength of 660 nm to 750 nm. A photo-luminescence peak ratio may be 0.2 or more in a Raman spectrum obtained by excitation with light having a wavelength of 532 nm as represented by the following formula: Photo-luminescence peak ratio=integrated intensity of peak in Raman shift region of 4300 cm−1 to 4500 cm−1/integrated intensity of peak in Raman shift region of 400 cm−1 to 450 cm−1.

Dependencies are inferred from the claim text.