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

The present invention aims to provide a sulfide solid electrolyte material with favorable ion conductivity, in which charge and discharge efficiency may be inhibited from decreasing. The object is attained by providing a sulfide solid electrolyte material, including: a Li element; a P element; and a S element, characterized in that the material has a peak at a position of 2θ=30.21°±0.50° in X-ray diffraction measurement using a CuKα ray, and the sulfide solid electrolyte material does not substantially include a metallic element belonging to the third group to the sixteenth group.