POLYMER ELECTROLYTE COMPOSITION, NEGATIVE ELECTRODE FOR LITHIUM METAL SECONDARY BATTERY, ELECTROLYTE FOR LITHIUM ION SECONDARY BATTERY, AND METAL SECONDARY BATTERY AND LITHIUM ION SECONDARY BATTERY USING THEM

摘要

PROBLEM TO BE SOLVED: To provide a polymer electrolyte composition capable of achieving both high ion conductivity and battery cycle life characteristics at ordinary temperature when used for a lithium metal battery and a lithium ion secondary battery.SOLUTION: There is provided a polymer electrolyte composition which comprises a polyurethane resin (U) having a number average molecular weight of 1000 to 500000 obtained by reacting a polyether diol (A) having a number average molecular weight of 500 to 100000 and an organic diisocyanate (B) and a lithium salt (L). The polyether diol (A) preferably is a copolymer (A2) obtained by adding an alkylene oxide containing ethylene oxide (a11) and an alkylene oxide (a12) having 3 to 4 carbon atoms as essential components to a dihydric alcohol in a random sequence and/or in a block sequence.SELECTED DRAWING: Figure 1