Patent ID: 6841299

Claim:
An electrolyte composition comprising: a molten salt represented by any of the following general formulae (1), (2) and (3); a cross-linked polymer cross-linked by an atomic group having a substructure —C—C-hetero atom—at two or more positions adjacent to an electron-withdrawing group, said hetero atom being at least one atom selected from the group consisting of S, N, and O prepared by a reaction between an electrophile having at least two unsaturated bonds polarized by said electron-withdrawing group and a nucleophile having a plurality of nucleophilic groups; and a metal salt containing a Group IA metal ion or a Group IIA metal ion wherein, in general formulae (1), (2) and (3), Q y1 represents an atomic group forming an aromatic cation having a 5- or 6-membered ring structure with the nitrogen atom, A y1 represents a nitrogen atom or a phosphorus atom, R y1 to R y11 independently represent a substituted or unsubstituted alkyl group or a substituted or unsubstituted alkenyl group, X − represents an anion, two or more of R y2 to R y5 in the general formula (2) optionally bond together to form a non-aromatic ring containing A y1 , and two or more of R y6 to R y11 , in the general formula (3) optionally bond together to form a ring.