| 摘要 |
A main object of the present invention is to provide a sulfide solid electrolyte whose reduction decomposition potential can be decreased more than a conventional LGPS-based sulfide solid electrolyte. The present invention is a sulfide solid electrolyte comprising Li, Al, Ge, P, and S, wherein M0 = M2/M1 is 0 < M0 < 0.323 where M1 is a mole fraction of contained P, and M2 is a mole fraction of contained Al, and in a case where each of X1 and X2 is an element selected from the group consisting of P, Ge, and Al, a crystal structure thereof includes an octahedron O formed by Li and S, a tetrahedron T1 formed by S and X1, and a tetrahedron T2 formed by S and X2, wherein the octahedron O and the tetrahedron T2 share a ridge, and the octahedron O and the tetrahedron T2 share an apex. |
