Electrolytic-solution-supporting polymer film and secondary battery

摘要

A high-strength, heat-resistant and high-safety electrolytic-solution-supporting polymer film which can be applied to secondary batteries typified by lithium and lithium ion secondary batteries and which has an ionic conductivity of at least 5x10-4 S/cm at 25° C., a puncture strength of at least 300 g and a mechanical heat resistance of at least 300° C.