SULFIDE SOLID ELECTROLYTE MATERIAL, POSITIVE ELECTRODE MATERIAL, AND BATTERY

• Main Authors: SASAKI IZURU, HIBINO JUNICHI
• Format: Patent
• Language: English
• Published: 16.11.2017
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

A sulfide solid electrolyte material includes a sulfide phase containing a sulfide material and an oxide phase containing an oxide formed by oxidation of the sulfide material. The oxide phase is located on a surface of the sulfide phase. The sulfide solid electrolyte material satisfies conditions: 1.28≦x≦4.06 and x/y≧2.60, where x denotes the oxygen-to-sulfur elemental ratio measured by XPS depth profiling at the outermost surface of the oxide phase; and y denotes the oxygen-to-sulfur elemental ratio measured by XPS depth profiling at a position 32 nm, estimated from the SiO2 sputtering rate, away from the outermost surface of the oxide phase.