Non-aqueous electrolyte solution for lithium secondary battery and lithium secondary battery including the same

摘要

A non-aqueous electrolyte solution for a lithium secondary battery and a lithium secondary battery including the same are provided. The non-aqueous electrolyte solution includes an organic solvent, an ionizable lithium salt, a dinitrile compound including an ether bond represented by Chemical Formula 1, and an aliphatic dinitrile compound represented by Chemical Formula 2. The lithium secondary battery including the non-aqueous electrolyte solution having the possibility of generating a swelling phenomenon while storing or charging/discharging at a high temperature may be restrained. In addition, a cycle life of the charging/discharging may be improved.

主权项

1. A non-aqueous electrolyte solution for a lithium secondary battery, comprising:
an organic solvent; an ionizable lithium salt; a dinitrile compound including an ether bond; and an aliphatic dinitrile compound, wherein the dinitrile compound including an ether bond is ethylene glycol bis(2-cyanoethyl)ether, and the aliphatic dinitrile compound is succinonitrile; wherein the ethylene glycol bis(2-cyanoethyl)ether is included in an amount of 0.1 to 10% by weight based on a total amount of the electrolyte solution; and the succinonitrile is included in an amount of 0.1 to 10% by weight based on a total amount of the electrolyte solution.