NOVEL LITHIUM POLYMER BATTERY

PROBLEM TO BE SOLVED: To increase the charging and discharging quantity with a small size and a light weight by using a polymer solid electrolyte film consisting of a copolymer formed of a glycidyl ether having an ethylene oxide unit having a specified polymerization degree in the side chain, ethylene oxide, and an oxylane compound having a cross-linkable group in specified blend ratios, and an electrolytic salt compound. SOLUTION: This battery is formed of a positive electrode containing a positive electrode active material, a negative electrode containing a negative electrode active material, and a polymer solid electrolyte film consisting of a copolymer formed of 1-90 mole% of a glycidyl ether having an ethylene oxide unit having a polymerization degree of 1-12 in the side chain, 1-95 mole% of ethylene oxide, and 0.005-15 mole% of an oxylane compound having a cross- linkable group, and an electrolytic salt compound. As the electrolytic salt compound, LiClO4 , LiBF4 or the like is used within a quantity range, where the ratio of the mole number of electrolytic salt compound/the total mole number of oxyethylene units is about 0.001-5. As the positive electrode active material, LiCoO2 or the like is used, and as the negative electrode active material, lithium or the like is used.