Patent ID: 8124283

Claim:
A solid polymer electrolyte composition comprising: 0.1-95 wt % of a cyclic siloxane-based crosslinking agent represented by the formula (1) below; 0.1-98 wt % of at least one plasticizer selected from the group consisting of polyalkylene glycol dialkyl ether represented by the formula (2) below, polymethyl(polyalkylene oxide)siloxane represented by the formula (3) below, methyl(polyalkylene oxide) cyclic siloxane represented by the formula (4) and a non-aqueous polar solvent; 3-40 wt % of lithium salt; and 0.1-5 wt % of a curing initiator: wherein R 1 , R 2 and R 3 are independently hydrogen or C 1 -C 6 alkyl; R 4 and R 5 are independently C 1 -C 10 linear or branched alkyl; R 6 , R 7 and R 8 are independently hydrogen or methyl, n and m are independently an integer of from 0 to 20 (except when both n and m are 0); o, p and q are independently an integer of from 0 to 20 (except when both p and q are 0); and x is an integer of from 1 to 1000.