Sulfide solid-state battery

Abstract

In a solid electrolyte layer of a sulfide solid-state battery, when the content of binder is increased in order to improve crack resistance, ion conductivity of the solid electrolyte layer lowers. Thus, provided is a sulfide solid-state battery including: a cathode, an anode, and a solid electrolyte layer provided between the cathode and the anode, the solid electrolyte layer containing a sulfide solid electrolyte, at least one binder selected from a fluorine-based binder and a rubber-based hinder, and ethyl cellulose. Incorporating ethyl cellulose along with the sulfide solid electrolyte and a predetermined binder into the solid electrolyte layer improves dispersiveness of the binder in the solid electrolyte layer, which improves crack resistance and ion conductivity of the solid electrolyte layer.

Dependencies are inferred from the claim text.