ION CONDUCTIVE SOLID AND ALL-SOLID-STATE BATTERY

WIPO Patent Application WO/2021/124812

A1

Provided are: an ion conductive solid that has high ion conductivity and can be produced using a low-temperature heat treatment; and an all-solid-state battery that comprises the conductive solid.　The ion conductive solid contains an oxide represented by general formula Li6-x-y-2zY1-x-y-zM1xM2yM3zB3O9. In the all-solid-state battery, a positive electrode, a negative electrode, and/or an electrolyte contains the ion conductive solid. (In the formula, M1 and M2 are each a tetravalent metal element, M3 is a pentavalent metal element, and x, y, and z are real numbers satisfying 0.000≤x+y<1.000, 0.000≤z<1.000, and 0.000