An all-solid-state lithium-ion secondary battery including a negative electrode for an all-solid-state lithium-ion secondary battery and its negative electrode.

摘要

PROBLEM TO BE SOLVED: To provide a negative electrode containing a Si alloy-based active material, which makes possible to offer an all-solid lithium ion secondary battery arranged so that the increase in internal resistance at a low charging rate can be suppressed.SOLUTION: A negative electrode for an all-solid lithium ion secondary battery comprises: a negative electrode containing a negative electrode active material and a solid electrolyte, provided that the negative electrode active material includes a Si alloy-based active material; and a solid electrolyte containing LiS-PS-LiI-LiBr based sulfide solid electrolyte.SELECTED DRAWING: Figure 1