MAGNESIUM SULFIDE MATERIAL, MAGNESIUM SULFIDE COMPOSITE MATERIAL, POSITIVE ELECTRODE MEMBER FOR SECONDARY BATTERIES, WIDE BAND GAP SEMICONDUCTOR MATERIAL, MAGNESIUM SECONDARY BATTERY, AND METHOD FOR PRODUCING ZINCBLENDE MAGNESIUM SULFIDE

摘要

Provided is a magnesium secondary battery which is provided with: a positive electrode member 23 that comprises at least a positive electrode active material layer 23B; a separator 24 that is arranged so as to face the positive electrode member 23; a negative electrode member 25 that is arranged so as to face the separator 24, while containing magnesium or a magnesium compound; and an electrolyte solution that contains a magnesium salt. The positive electrode active material layer 23B is composed of a magnesium sulfide that has a zincblende crystal structure.