Electrolyte for lithium secondary battery and lithium secondary battery including the same

An electrolyte for a lithium secondary battery, comprising:

• an organic solvent;
• a lithium salt;
• a first additive represented by Chemical Formula 1;
• and
• a second additive represented by Chemical Formula 2,
• wherein a weight ratio of the first additive and the second additive is from 1:0.25 to 1:3:
• wherein, in Chemical Formula 1, R1 is a saturated hydrocarbon backbone structure having 3 to 10 carbon atoms, and n is an integer of 1 to 3,
• wherein, in Chemical Formula 2, R11 to R13 are each independently hydrogen, or a substituted or unsubstituted alkyl group having 1 to 6 carbon atoms, and A is a substituent represented by Chemical Formula 3 or Chemical Formula 4,
• wherein, in Chemical Formulae 3 and 4, R14 and R15 are each independently a substituted or unsubstituted alkyl group having 1 to 6 carbon atoms, a substituted or unsubstituted aryl group having 6 to 12 carbon atoms, or —OR16, and
• R16 is a substituted or unsubstituted alkyl group having 1 to 6 carbon atoms, a substituted or unsubstituted aryl group having 6 to 12 carbon atoms, or an alkynyl group having 2 to 6 carbon atoms.