Patent ID: 8124284

Claim:
A nonaqueous electrolytic solution for a lithium-ion cell containing a nonaqueous solvent and a lithium salt dissolved therein, serving as a solvent for a fluorine resin used as an adhesive of positive and negative electrodes, the electrolytic solution comprising an additive containing at least two compounds, wherein at least one compound is selected from the group consisting of 2-pyrrolidinone compounds represented by the following formula (I) and at least one compound is selected from the group consisting of cyclic alkyl compounds represented by the following formula (II): wherein R 1 represents a hydrogen atom or a straight-chain or branched-chain alkyl group having 1 to 4 carbon atoms, wherein R 2 represents a straight-chain or branched-chain alkylene group having 2 to 4 carbon atoms, wherein said additive is added in an amount such that the compound is present in an amount of 0.1 to 10.0% (by weight) based on the amount of said nonaqueous electrolytic solution containing a lithium salt dissolved therein.