| abstract |
The invention relates to a solid electrolyte and an all-solid-state battery, which improves the ionic conductivity of the solid electrolyte and improves the battery characteristics of the all-solid-state battery. The solid electrolyte is a solid electrolyte having a garnet-type crystal structure. The solid electrolyte is composed of the general formula (Li 7-ax+y A x )La 3 (Zr 2- y By )O 12 (A is at least one element selected from the group consisting of Mg, Zn, Al, Ga and Sc , a is the valence state of A, B is at least one element selected from the group consisting of Al, Ga, Sc, Yb, Dy and Y, 0<x<1.0, 0<y<1.0, 5.5<7‑ax +y<7.0) indicated. |