| 摘要 |
PURPOSE:To prevent an internal short-circuit in dendrite-shaped lithium deposited in a lithium negative electrode at charge time by charging a fine hole of a separator with an ion conduction gel electrolyte. CONSTITUTION:A microporous polyethylene film 1 is processed by a nonionic surface active agent to give a hydrophilic property, and a mixed fluid of organic electrolyte and ultraviolet hardening resin is applied to this film to impregnate it with the mixed fluid. Next by ultraviolet irradiation, an ion conductive gel electrolyte layer 2 is formed in this film. Here by deforming the film by heat at the time of ultraviolet irradiation to prevent a hole from being crushed, in order to improve a mold releasing property, a glass plate surface coated with a fluororesin is closely attached to the film. An ultraviolet ray is applied after preventing an influence by oxygen and heat. Thus in both surfaces of the polyethylene film 1, the ion conductive gel electrolyte layer 2 is integrally formed. In this way, an internal fine short-circuit, generated by inserting dendrite to the hole of a separator, can be prevented, and a cycle characteristic can be improved. |
