In {TAIL ~ other words}, {HEAD ~ the polymer electrolytes} of the present invention are characterized in that they contain a polymer material having a ketonic carbonyl group wherein the ratio of the weight of the ketonic carbonyl group relative to the weight of the polymer material is 15 wt % to 50 wt % 
In { TAIL ~ other words } , { HEAD ~ the polymer electrolytes } of the present invention are characterized in that they contain a polymer material having a ketonic carbonyl group wherein the ratio of the weight of the ketonic carbonyl group relative to the weight of the polymer material is 15 wt % to 50 wt %
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