▎ 摘　　要

NOVELTY - Sulfide-based solid electrolyte comprises a lithium metal compound (I) with an argyrodite type crystal structure. USE - The sulfide-based solid electrolyte is used in an all-solid-state battery (claimed), where the batteries are used in many portable applications such as cell phones, laptops, video cameras and medical devices, and in electric and hybrid electric vehicles. ADVANTAGE - The sulfide-based solid electrolyte has an effect of improving the capacity and stability of the battery by solving the problem of interfacial resistance of the solid electrolyte by including the cathode coating material in the electrolyte, and exhibits higher ionic conductivity, mechanical stability, and electrochemical stability. DETAILED DESCRIPTION - Sulfide-based solid electrolyte comprises a lithium metal compound of formula: LixMyN1z(I) with an argyrodite type crystal structure. M=a transition metal, a group 13 element or a group 14 element; N1=chalcogen element; x=1-4; y=1-5;and z=1-12. INDEPENDENT CLAIMS are included for the following: a method for manufacturing the sulfide-based solid electrolyte, comprising mixing a precursor material that forms the argyrodite-type crystal structure and a compound (I); and an all-solid-state battery, comprising a negative electrode layer, a positive electrode layer, and a solid electrolyte layer interposed between the negative electrode layer and the positive electrode layer, wherein the solid electrolyte layer includes the sulfide-based solid electrolyte.