リチウムイオン二次電池用非水電解液及びリチウムイオン二次電池

摘要

PROBLEM TO BE SOLVED: To provide a nonaqueous electrolyte for a lithium ion secondary battery which can obtain sufficient initial discharge capacity and furthermore, which can withstand the high-temperature storage test.SOLUTION: A nonaqueous electrolyte for a lithium ion secondary battery contains a nonaqueous solvent, an electrolyte, 0.05 to 4 mass% of fluoroethylene carbonate and 0.001 to 1 mass% of chain ether having tertiary carbon.