Electrolytic Solution for Secondary Battery and Lithium Secondary Battery Including the Same

The present disclosure relates to an electrolytic solution for a secondary battery and a lithium secondary battery employing the same. The electrolytic solution for a secondary battery of the present disclosure contains a sulfonyl compound, such that a lithium secondary battery employing a high content of nickel for a cathode has significantly improved quick charge characteristics, room temperature lifespan characteristics, and low-temperature characteristics.