Solid electrolyte

摘要

A solid electrolyte is prepared by dissolving a solvent and an electrolyte salt in a trifunctional polymer and crosslinking it by an irradiation of an active radiation and/or heating, characterized by that said trifunctional polymer is a trifunctional terminal acryloyl-modified alkylene oxide polymer containing a polymer chain expressed by the following general formula (I) as each functional chain; <IMAGE> (I) in which R' is a lower alkyl group, R'' is hydrogen or methyl group and m or n is 0 or an integer of at least 1 and m+n>/=35, and the amount of said solvent is 220 to 950 weight % based on said trifunctional terminal acryloyl-modified alkylene oxide polymer.