Patent ID: 6924065

Claim:
A lithium battery comprising: a cathode including an electrochemically active material; an anode including a material into which lithium ions intercalate; and a gel type polymer electrolyte through which the lithium ions move between said anode and cathode, the gel type polymer electrolyte comprising an electrolyte and a separator, the separator having a matrix comprising a mixture of polyvinylchloride and at least one polymer selected from the group consisting of polyvinylidenefluoride, a vinylidenefluoride/hexafluoropropylene copolymer, polymethacrylate, polyacrylonitrile and polyethyleneoxide, wherein the matrix is made by dissolving the mixture of polyvinylchloride and the at least one polymer in a solvent to form a resultant product for casting; casting the resultant product on a support body; drying the cast resultant product to remove the solvent used for casting so as to form a film on the support body; and separating the film from the support body.