| 摘要 |
PURPOSE: A lithium secondary battery is provided to have excellent low temperature power performance, storage performance, and high temperature storage performance by comprising non-aqueous electrolyte with excellent stability in high temperatures. CONSTITUTION: A lithium secondary battery comprises an electrode assembly, a case accepting the electrode assembly, and electrolyte in the case. The electrolyte comprises a first additive selected from a compound in chemical formula 1, a compound in chemical formula 2, and a mixture thereof, a second additive selected from a compound in chemical formula 3, a compound in chemical formula 4 and a mixture thereof, a lithium salt, and a non-aqueous organic solvent. The weight ratio of the first additive and the second additive is 1:5-3:1. |
