NONAQUEOUS ELECTRICITY STORAGE DEVICE AND LITHIUM ION SECONDARY BATTERY

摘要

PROBLEM TO BE SOLVED: To provide a nonaqueous electricity storage device capable of reducing man-hours in manufacturing an electrode assembly including a ceramic coat separator and a ceramic separator which cannot be thermo-welded.SOLUTION: A lithium ion secondary battery 10 is a nonaqueous electricity storage device including a laminate-type electrode assembly 12 stored together with an electrolyte in a case 11, the electrode assembly including a sheet-like electrode 13 for a positive electrode and a sheet-like negative electrode being laminated while a ceramic separator 15 is interposed between the electrodes. The electrolyte contains a substance having a melting point of 25°C or above. The electrode 13 constitutes the electrode assembly 12 while being stored in the ceramic separator 15 that is bonded by the substance to be formed in a bag shape.