SULFIDE-BASED SOLID-STATE BATTERY

An object of the present invention is to provide a sulfide-based solid battery which has high charge-discharge capacity especially under high current density conditions. Disclosed is a sulfide-based solid battery comprising a positive electrode, a negative electrode and a sulfide-based solid electrolyte layer, the sulfide-based solid electrolyte layer being present between the positive electrode and the negative electrode, wherein the negative electrode comprises at least a negative electrode active material layer; wherein the negative electrode active material layer comprises negative electrode active material fine particles and sulfide-based solid electrolyte fine particles; and wherein the ratio of average particle diameter r a of the negative electrode active material fine particles to average particle diameter r s of the sulfide-based solid electrolyte fine particles (r a /r s ) is 2.0 or more.