Electrolyte additive for lithium secondary battery, electrolyte for lithium secondary battery including the same, and lithium secondary battery including electrolyte

An electrolyte for a lithium secondary battery, comprising:

• a lithium salt;
• a non-aqueous organic solvent;
• and
• an electrolyte additive comprising a compound represented by Formula 1:
• wherein, in Formula 1, R1 to R3 are each independently hydrogen, a substituted or unsubstituted C1-C30 alkyl group, a substituted or unsubstituted C4-C30 carbocyclic group, a substituted or unsubstituted C6-C30 aryl group, a substituted or unsubstituted C2-C30 alkenyl group, a substituted or unsubstituted C2-C30 alkynyl group, or a substituted or unsubstituted C2-C30 heteroaryl group, and
• R4 to R6 are each independently a substituted or unsubstituted C1-C30 alkyl group, a substituted or unsubstituted C4-C30 carbocyclic group, a substituted or unsubstituted C6-C30 aryl group, a substituted or unsubstituted C2-C30 alkenyl group, a substituted or unsubstituted C2-C30 alkynyl group, or a substituted or unsubstituted C2-C30 heteroaryl group.