{TAIL ~ The present invention} relates to a highly ion conducting polymer electrolyte containing a polymer material having a ketonic carbonyl group wherein the ratio of the weight of the ketonic carbonyl group relative to {HEAD ~ the weight} of the polymer material is 15 wt % to 50 wt % It further relates to an electrochemical device using the polymer electrolyte, which has excellent liquid leakage resistance, heat resistance, and safety 
{ TAIL ~ The present invention } relates to a highly ion conducting polymer electrolyte containing a polymer material having a ketonic carbonyl group wherein the ratio of the weight of the ketonic carbonyl group relative to { HEAD ~ the weight } of the polymer material is 15 wt % to 50 wt % It further relates to an electrochemical device using the polymer electrolyte , which has excellent liquid leakage resistance , heat resistance , and safety
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