ELECTROLYTE SOLUTION FOR RECHARGEABLE LITHIUM BATTERY AND RECHARGEABLE LITHIUM BATTERY INCLUDING THE SAME

Disclosed are an electrolyte solution for a rechargeable lithium battery and rechargeable lithium battery including the same, the an electrolyte solution for a rechargeable lithium battery including a non-aqueous organic solvent, a lithium salt, and an additive, wherein the additive includes a first compound represented by Chemical Formula 1 and a second compound that is CsPF6 or a compound represented by Chemical Formula 2, and a weight ratio of the first compound to the second compound is 1: 0.3 to 1: 1.3.