ELECTROLYTE SOLUTION FOR LITHIUM ION SECONDARY BATTERIES AND LITHIUM ION SECONDARY BATTERY USING SAME

摘要

Provided is an electrolyte solution by use of which a secondary battery having a small volume change when being charged/discharged and having excellent cycle characteristics can be formed. The present embodiment pertains to an electrolyte solution, for lithium ion secondary batteries, which contains a fluorinated ether and a cyclic dicarboxylic acid ester.