| abstract |
(57) [Abstract] [Purpose] To provide a polymer solid electrolyte lithium battery having a high lithium ion transport number and a high charge / discharge cycle characteristic having a high energy density and a high safety without liquid leakage. The purpose is to provide. SOLUTION: A first polymer in which a polymer having a polyether structure forms a three-dimensional network structure is covalently bonded to a second polymer having a boron atom and a polyether structure in the molecular structure. By using a solid polymer electrolyte that contains an ion dissociable salt, The above problem can be solved. As the second polymer, for example, polyoxyethylene glycol monoalkyl ether borate ester is preferably used in an amount of 30 to 70% by weight in the solid electrolyte. |