Patent ID: 6096234
Filing Date: 2000-08-01
Classification: H01M,Y02E,Y10S

Abstract:
A method of manufacturing a cross-linked polymer solid electrolyte, said method comprising the steps ofproviding a block-graft copolymer composed of a polymer block chain A and a polymer block chain B at a component ratio of 1:30 to 30:1 and having a degree of polymerization of not less than 310, the polymer block chain A having a recurrent structure unit as represented by formula I below and a degree of polymerization of not less than 10 ##STR8## wherein R.sup.1 represents a hydrogen atom, a methyl group, or an ethyl group; R.sup.2 represents a hydrogen atom or a methyl group; R.sup.3 represents a hydrogen atom, an alkyl group, an aryl group, an acyl group, a silyl group, or a cyanoalkyl group; n represents an integer between 1 and 100 inclusive; and the graft chain moiety of the formula I as represented below has a number average molecular weight of 45 to 4400, ##STR9## the polymer block chain B having a recurrent structure unit as represented by formula II below and a degree of polymerization of not less than 300 ##STR10## wherein R.sup.4 represents a hydrogen atom, a methyl group, or an ethyl group; M represents a group represented by --CH.dbd.CH.sub.2, --C(CH.sub.3).dbd.CH.sub.2, --COOCH.sub.3, or --COOC.sub.2 H.sub.5, a phenyl group, or a substituted phenyl group;adding a crosslinking agent to the block-graft copolymer;irradiating a high energy ray of a dose of 10 Mrad or more to the block-graft polymer in order to crosslink the entire system; andadding an nonaqueous electrolytic solution to the block-graft polymer.