Patent ID: 7517615

Claim:
A process for producing a gel electrolyte which comprises heating or irradiating with actinic radiation a solution containing an electrolyte salt, a solvent for the electrolyte salt, and a bifunctional (meth)acrylate represented by the following formula (I): wherein R represents a divalent group selected from: (a) an alkylene group, (b) a divalent group represented by the following general formula (II): wherein R 2 represents an alkyl group, and R 3 and R 4 each independently represents an alkylene group, (c) a xylylene group, and (d) a divalent group represented by the following general formula (III): R 1 represents a hydrogen atom or a methyl group, to polymerize the bifunctional (meth)acrylate, thereby forming a crosslinked polymer and forming a gel in which the electrolyte salt and the solvent are held in a matrix comprising the crosslinked polymer.