Patent ID: 8293389

Claim:
An all-solid-state lithium secondary battery using a sulfide-based solid electrolyte material, wherein the battery has a metal salt M-X comprising a metal element “M” and an anionic part “X” in a battery case thereof, and further wherein a metal cation of the metal salt M-X generated by disassociation caused with water can react with a sulfide ion generated by a reaction between the sulfide-based solid electrolyte material and the water, and further wherein the metal salt is provided in a place inside the battery case where no potential is applied, and further wherein the metal element “M” of the metal salt M-X is at least one selected from the group consisting of Cd, Sn, Pb, Cu, Hg, Ag, Mn, Zn, Fe and Ni, and further wherein the anionic part “X” of the metal salt M-X is at least one selected from the group consisting of OH, SO, and NO 3 .