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

Disclosed is an electrolyte solution for a rechargeable lithium battery that includes a lithium salt; a non-aqueous organic solvent including an alkyl acetate; and an additive including a sultone-based compound, wherein the sultone-based compound is included in an amount ranging from 0.1 to 5 wt% based on the total amount of the electrolyte solution.