SULFIDE-BASED SOLID BATTERY

摘要

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 including 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 includes at least a negative electrode active material layer; wherein the negative electrode active material layer includes negative electrode active material fine particles and sulfide-based solid electrolyte fine particles; and wherein the ratio of average particle diameter ra of the negative electrode active material fine particles to average particle diameter rs of the sulfide-based solid electrolyte fine particles (ra/rs) is 2.0 or more.

主权项

1. 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 ra of the negative electrode active material fine particles to average particle diameter rs of the sulfide-based solid electrolyte fine particles (ra/rs) is 2.0 or more; wherein the average particle diameter ra of the negative electrode active material fine particles is 50 μm or less; and wherein the battery is charged at a current density of 1 C or more.