GALLIUM-SUBSTITUTED SOLID ELECTROLYTE MATERIAL, AND ALL-SOLID-STATE LITHIUM ION SECONDARY BATTERY

Provided is a novel solid electrolyte material of high density and high ionic conductivity, and an all-solid-state lithium ion secondary battery that utilizes the solid electrolyte material. The solid electrolyte material has a chemical composition represented by LiGaLaZrO(0.08≤x