Patent ID: 6677084
Filing Date: 2004-01-13
Classification: C08G,C08J,C08L,H01B,H01M,Y02E

Abstract:
A solid polymer electrolyte comprising:(I) a crosslinked material obtainable by crosslinking a composition comprising: (i) a polyether copolymer having a weight-average molecular weight within a range from 105 to 107 and comprising (A) 5 to 95 mol % of a repeating unit derived from a monomer represented by the formula (1): â€ƒwherein R1, R2 and R3 are the same or different and each is a hydrogen atom or â€”CH2O(CH2CH2O)nR, where n and R may be different among R1, R2 and R3, provided that all of R1, R2 and R3 are not simultaneously a hydrogen atom; R is an alkyl group having 1 to 12 carbon atoms; and n is from 0 to 12, and (B) 95 to 5 mol % of a repeating unit derived from a monomer represented by the formula (2): (ii) a crosslinking agent selected from an organic peroxide and/or an azo compound, 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) optionally a plasticizer selected from the group consisting of an aprotic organic solvent and metal salt of linear or branched polyalkylene glycol having a number-average molecular weight of from 200 to 5,000.