SOLID-STATE LITHIUM BATTERY

The main object of the present invention is to provide a solid-state lithium battery in which a thermal stability is improved. The present invention solves the problem by providing a solid-state lithium battery comprising a cathode active material layer containing a cathode active material, an anode active material layer containing an anode active material, and a solid electrolyte layer formed between the cathode active material layer and the anode active material layer, characterized in that the cathode active material is an oxide active material; at least one of the cathode active material layer and the solid electrolyte layer contains a sulfide solid electrolyte material; the sulfide solid electrolyte material comprises the element Li, the element P, the element S, and the element I; and the cathode active material layer contains a specific phosphate ester.