Electrolyte Solution for Secondary Battery and Secondary Battery Including the Same

An electrolyte solution for a secondary battery comprising a silatrane-based compound represented by Chemical Formula 1:

• wherein, in Chemical Formula 1, each X includes an oxygen, sulfur, nitrogen, or phosphorus atom and Xs are the same;
• R1 is an electron donating group, C1 to C10 linear alkyl group substituted with an electron donating group, C3 to C10 branched alkyl group substituted with an electron donating group, C3 to C10 cyclic alkyl group substituted with the electron donating group, or —R1′—Nu,
• the electron donating group includes one or more of a hydroxyl group, an alkoxy group, a primary to tertiary amine group, a thiol group, a sulfide group, a vinyl group and a halide group, R1′ is a C1 to C5 linear alkyl group or branched alkyl group, and Nu is an imine group or a cyano group;
• and
• R2, R3, R4, R5, R6, and R7 are selected from a group consisting of H, a C1 to C6 linear alkyl group, branched alkyl group, and cyclic alkyl group.