| abstract |
Disclosed are an electrolytic solution for a lithium secondary battery and a lithium secondary battery in which various characteristics such as high capacity, cycle characteristics, high-temperature storage characteristics, continuous charge characteristics, and overcharge characteristics, in particular, storage characteristics are improved. SOLUTION: A non-aqueous electrolyte solution in which a lithium salt is dissolved in a non-aqueous organic solvent, wherein the non-aqueous electrolyte solution contains a chain carboxylic acid ester in an amount of 5 to 70% by mass with respect to the mass of the non-aqueous electrolyte solution. And a non-aqueous electrolyte containing a compound having two or more isocyanate groups. [Selection figure] None |