| abstract |
The present invention relates to a lithium secondary battery, wherein a lithium secondary battery according to an embodiment includes a negative electrode, a positive electrode including a positive electrode active material, and a nonaqueous electrolyte, wherein the nonaqueous electrolyte contains a nonaqueous organic solvent, 1 to 4, and a second additive comprising at least one of compounds represented by the following formulas (5) to (6), wherein the cathode active material comprises at least 70 mol% Ni. ≪ / RTI > [Chemical Formula 1] (2) (3) [Chemical Formula 4] [Chemical Formula 5] [Chemical Formula 6] The definition of each substituent and n, m1, m2 in the above formulas (1) to (6) are as described in the detailed description. |