| 摘要 |
PROBLEM TO BE SOLVED: To enhance ion conductivity and to increase electrochemical stability by constituting a polycarbonate electrolyte with a polycarbonate film matrix containing specific polycarbonate and a filler, and a lithium salt-containing electrolyte impregnated in the polycarbonate film matrix. SOLUTION: Polycarbonate contained in a film matrix is represented by the formula. In the formula, R is a hydrogen or a 1-10C alkyl group and (n) is an integer of 50-1000. In the film matrix, the weight ratio of the polycarbonate to the filler is preferable to be (0.1-5): 1. The thickness of the film matrix is preferable to be 10-200 μm. As the filler, an inorganic oxide, especially silicon dioxide or alumina is preferable, and thereby, the mechanical property is improved, structure is stabilized, and ion conductivity is increased in the film matrix. As the lithium salt-containing electrolyte, lithium salt of propyl carbonate or ethyl carbonate, and lithium hexafluorophosphate are preferable. |
