| 摘要 |
An electrolyte for a lithium secondary battery, and a lithium secondary battery including the same are provided. The electrolyte includes: a cyclic ester; an organic solvent including a nitrile-containing solvent represented by Formula 1 at a content ranging from 1 to 5% by volume; and a lithium salt, <?in-line-formulae description="In-line Formulae" end="lead"?>R-C≡N (1)<?in-line-formulae description="In-line Formulae" end="tail"?> wherein R is selected from the group consisting of a C<SUB>1 </SUB>to C<SUB>10 </SUB>aliphatic hydrocarbon, a C<SUB>1 </SUB>to C<SUB>10 </SUB>halogenated aliphatic hydrocarbon, a C<SUB>6 </SUB>to C<SUB>10 </SUB>aromatic hydrocarbon, and a C<SUB>6 </SUB>to C<SUB>10 </SUB>halogenated aromatic hydrocarbon. The electrolyte can improve swelling characteristics and discharge capacity characteristics at a low temperature, and realize equal or better performance in characteristics such as capacity, life span and the like, as compared to a conventional carbonate-containing electrolyte.
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