ELECTROLYTE FOR LITHIUM SECONDARY BATTERY AND LITHIUM SECONDARY BATTERY COMPRISING SAME

Provided is an electrolyte for a lithium secondary battery that comprises a non-aqueous organic solvent, a lithium salt, and an additive, wherein the additive includes a mixture of a compound represented by Chemical Formula 1, a compound represented by Chemical Formula 2, and a cyclic carbonate-based compound substituted with a halogen. The details of Chemical Formula 1 and Chemical Formula 2 are as described in the specification.