ELECTROLYTE FOR LITHIUM-SULFUR BATTERY AND LITHIUM-SULFUR BATTERY COMPRISING SAME

The present invention relates to an electrolyte solution for a lithium-sulfur batteries comprising a lithium salt and an organic solvent, wherein the organic solvent comprises a first solvent, a second solvent, and a third solvent, the first solvent comprises a compound represented by Formula 1 or Formula 2 containing a cyano group (-CN); a linear ether containing two or more oxygen atoms; or a cyclic ether, the second solvent comprises a fluorinated ether-based solvent, and the third solvent comprises an ether-based non-solvent represented by Formula 3 below.