Patent ID: 6680149
Filing Date: 2004-01-20
Classification: H01B,H01M,Y02E

Abstract:
A solid polymer electrolyte of polyether poly(N-substituted urethane) comprising an electrolytic compound and a polymer matrix, wherein the polymer matrix is a copolymer having a weight average molecular weight of 50,000-2,000,000 and comprising a polyether unit of formula (1) and poly(N-substituted urethane) unit having oligooxyethylene side chains of formula (2): wherein R is a hydrogen atom or alkyl; R1, R2 and R3 are optionally alkyl, aryl, alkylaryl or oligo(ethylene oxide) derivatives and at least one of R1, R2 and R3 is oligo(ethylene oxide) derivative; I is isocyanate; E is a glycol or an amine having a number average molecular weight of 400 or less; m is an integer of 2-4; n is an integer of 1-60; and x is an integer of 1-5.