ALL SOLID LITHIUM SECONDARY BATTERY AND METHOD OF MANUFACTURING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide an all solid lithium secondary battery with low product failures.

SOLUTION: Provided is a secondary battery in which a positive electrode current collecting film 3 made of Pt is formed on a substrate 1, a positive electrode film 5 made of LiCoO2is layered on the positive electrode current collecting film 3, and the positive electrode film 5 is covered at its periphery with a polymer layer 7 made of polyethylene. The inner side surfaces of the polymer layer 7 are at a right angle with the surface of the substrate 1. The surface of the positive electrode film 5 is not shielded with the polymer layer 7 when viewed from the polymer layer 7 toward the substrate 1. The polymer layer 7 and the positive electrode film 5 are covered continuously with a solid electrolyte film 10 made of LiPON. A negative electrode film 12 made of metal lithium (Li) is layered on the solid electrolyte 10, and a negative electrode current collecting film 14 made of Cu is formed on the positive electrode film 12.

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