Sulfide solid electrolyte and all-solid-state battery

Abstract

To provide a sulfide solid electrolyte with enhanced reduction resistance and an all-solid-state battery equipped with the sulfide solid electrolyte.SOLUTION: The sulfide solid electrolyte contains Al and N and has a crystal structure. An all-solid-state battery 10, which is a secondary battery, includes a negative electrode layer 1 and a positive electrode layer 2 arranged with a solid electrolyte layer 3 interposed therebetween. The negative electrode layer 1 has a negative electrode substrate layer 4 and a negative electrode mixture layer 5, with the negative electrode substrate layer 4 forming the outermost layer of the negative electrode layer 1. The positive electrode layer 2 has a positive electrode substrate layer 7 and a positive electrode mixture layer 6, with the positive electrode substrate layer 7 forming the outermost layer of the positive electrode layer 2. In the all-solid-state battery 10 shown in FIG. 1, the positive electrode mixture layer 6, the solid electrolyte layer 3, the negative electrode mixture layer 5, and the negative electrode substrate layer 4 are laminated in this order on the positive electrode substrate layer 7, and at least one of the negative electrode layer 1, the solid electrolyte layer 3, the positive electrode layer 2, or a combination thereof contains the sulfide solid electrolyte.SELECTED DRAWING: Figure 1

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