SULFIDE SOLID ELECTROLYTE MATERIAL, BATTERY, AND PRODUCING METHOD FOR SULFIDE SOLID ELECTROLYTE MATERIAL

The object of the present invention is to provide a sulfide solid electrolyte material with favorable ion conductivity. The present invention attains the object by providing a sulfide solid electrolyte material comprising an Melement (such as a Li element), an Melement (such as a Ge element and a P element), a S element and an O element, and having a peak at a position of 2θ = 29.58° ± 0.50° in an X-ray diffraction measurement using a CuKα ray, characterized in that when a diffraction intensity at the peak of 2θ = 29.58° ± 0.50° is regarded as Iand a diffraction intensity at a peak of 2θ = 27.33° ± 0.50° is regarded as I, a value of I/Iis less than 0.50.