| 摘要 |
An object of the invention is to provide such a battery that has a high capacity, is excellent in storage characteristics, cycle characteristics and continuous charging characteristics, and is small in gas generation amount, whereby size reduction and improvement in performance of a lithium secondary battery can be attained. The present invention relates to a nonaqueous electrolytic solution comprising a lithium salt and a nonaqueous solvent dissolving the same, wherein the electrolytic solution contains, as the lithium salt, LiPF<SUB>6 </SUB>in a concentration of from 0.2 to 2 mole/L, and LiBF<SUB>4 </SUB>and/or a compound represented by the following formula (1) in a molar ratio of from 0.005 to 0.4 with respect to LiPF<SUB>6</SUB>, and the nonaqueous solvent mainly comprises (1) ethylene carbonate and/or propylene carbonate, (2-1) a symmetric linear carbonate, (2-2) an asymmetric linear carbonate, and (3) vinylene carbonate.
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