| abstract |
In the present invention, an organic solvent; Lithium salts; And a phosphorus compound represented by the following formula (1), and a lithium secondary battery comprising the same. The non-aqueous electrolyte contains a phosphorus compound of the following formula (1), thereby forming a stable SEI on the electrode during charging and discharging of the battery, thereby improving the lifetime characteristics of the battery and the initial capacity and output characteristics at room temperature and low temperature. [Chemical Formula 1] (Wherein X 1 and X 2 , R, m and n are as defined in the specification) |