Ion-conductive solid and all-solid-state battery

Abstract

Provided are: an ion-conductive solid which can be produced by heat treatment at a low temperature and which has high ion conductivity; and, an all-solid-state battery having the ion-conductive solid. An ion-conductive solid containing an oxide represented by the general formula Li6-3a-2b-c-dYi1-c-dAlaMgbZrcCedB3O9; and, an all-solid-state battery having at least a positive electrode, a negative electrode, and an electrolyte, at least one element selected from the group consisting of the positive electrode, the negative electrode, and the electrolyte containing the ion-conductive solid (In the formula, a is such that 0.000≤a≤0.800, b is such that 0.000≤b≤0.800, c is such that 0.000≤c≤0.400, d is such that 0.000≤d≤0.400, and a and b are real numbers satisfying 0.005≤a+b≤0.800.).

Dependencies are inferred from the claim text.