DEVELOPMENT OF POLYETHYLENE TETRAFLUOROETHYLENE MICROPOROUS FILM FOR ADVANCED BATTERIES

Lithium batteries have been recognized as advanced high-performance an d high-power sources because they provide light weight, high energy de nsity and high voltage. The quality of these type of batteries is dete rmined by the efficiency of electron transfer in an electrolyte as wel l as the microporous structure of the membrane separator. In this repo rt, we describe the development of a superior ETFE (polyethylene tetra fluoroethylene) microporous polymeric membrane suitable for use as the separator for lithium/Cu (II) rechargeable batteries and lithium/thio nyl chloride primary batteries. The requirements for a microporous mem brane to be employed in these lithium batteries are discussed. We repo rt the membrane fabrication and membrane performance in both primary a nd secondary batteries.