| abstract |
(1) a polyether copolymer having a main skeleton derived from ethylene oxide and a side chain of oligo-oxyethylene, (2) an electrolyte salt compound, and (3) an aprotic organic solvent, or a number average molecular weight of 200 to 5,000 Solid polymer electrolytes prepared by mixing a derivative or a metal salt of phosphorus polyalkylene glycol, or a plasticizer composed of a metal salt of the derivative thereof have better ion conductivity than conventional solid electrolytes, and at the same time have excellent workability, moldability and mechanical strength. Have The polymer electrolyte is combined with a cathode of lithium metal and a cathode of lithium cobaltate to form a rechargeable battery. |