| 摘要 |
PURPOSE: Provided is a non-aqueous electrolyte which reduces the swelling of battery at high temperature and improves the safety of battery. A lithium secondary battery comprising the electrolyte is also provided. CONSTITUTION: The electrolyte for lithium secondary battery comprises lithium salt, a non-aqueous organic solvent and a compound represented by the formula 1, wherein R1 is selected from the group consisting of alkyl, alkenyl, alkynyl, aryl and cyclic alkyl and X is a halogen selected from the group consisting of fluorine, chlorine and bromine. The compound of the formula 1 is added in an amount of 0.01 to 10 wt% based on 100 wt% of the electrolyte. The lithium secondary battery comprises the above electrolyte; a cathode comprising lithium intercalation compound as a cathode active material; and an anode comprising carbon, carbon composite, lithium metal and lithium alloy as an anode active material. |
