abstract |
A solid polymer electrolyte containing (I) a crosslinked material obtainable by crosslinking a composition containing (i) a polyether copolymer having a weight-average molecular weight within a range from 10<5 >to 10<7 >and having 5 to 95 mol % of repeating unit derived from a glycidyl compound, and 95 to 5 mol % of repeating unit derived from ethylene oxide, (ii) a crosslinking agent selected from organic peroxides and azo compounds, and (iii) a crosslinking aid which is an organic compound having a carbon-carbon double bond and an imide group, (II) an electrolyte salt compound, and (III) a plasticizer, is excellent in mechanical properties and ionic conductivity. |