LITHIUM SECONDARY BATTERY SEPARATOR AND METHOD OF MANUFACTURING SAME

摘要

Provided is a lithium secondary battery separator including a stack body of a base and a porous heat-resistant polyimide film which covers at least one surface of the base. The porous heat-resistant polyimide film has holes which are regularly arrayed three-dimensionally and a film thickness of 5-20µm. Penetration damage to the separator by growth of dendrite-shaped lithium is avoided, and it is also possible to achieve a request which is demanded of the lithium secondary battery separator.