| abstract |
A solid polymer electrolyte containing (I) a crosslinked materialnobtainable by crosslinking a composition containing (i) a polyether copolymernhaving a weight-average molecular weight within a range from 10 5 to 10 7 andnhaving 5 to 95 mol% of repeating unit derived from a glycidyl compound, andn95 to 5 mol% of repeating unit derived from ethylene oxide, (ii) a crosslinkingnagent selected from organic peroxides and azo compounds, and (iii) ancrosslinking aid which is an organic compound having a carbon-carbonndouble bond and an imide group, (II) an electrolyte salt compound, and (III) anplasticizer, is excellent in mechanical properties and ionic conductivity. |