NONAQUEOUS ELECTROLYTE SECONDARY CELL

摘要

A nonaqueous electrolyte secondary cell, wherein an electrolyte comprises a cyclic carboxylic acid ester as a nonaqueous solvent and further comprises a cyclic carbonic acid ester having at least one carbon-carbon unsaturated bond. A cyclic carboxylic acid ester exhibits a high electrical conductivity under low temperature circumstances and the cyclic carbonic acid ester is added for the purpose of suppressing the reduction decomposition of the cyclic carboxylic acid ester.