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

An electrolyte comprising:

• a non-aqueous organic solvent;
• a lithium salt;
• and
• an additive,
• wherein the non-aqueous organic solvent comprises a first compound represented by Formula 1, and
• the additive comprises a second compound represented by Formula 2:
• wherein, in Formula 1,
• R1 is a substituted or unsubstituted C1 to C6 alkyl group, or a substituted or unsubstituted C1 to C12 aryl group, and
• R2 is a direct bond or a C1 to C6 alkylene group, and
• wherein, in Formula 2, n is an integer of 1 to 8, and
• wherein the electrolyte is an electrolyte for a rechargeable lithium battery.