ELECTROLYTE SOLUTION FOR LITHIUM SECONDARY BATTERY AND LITHIUM SECONDARY BATTERY INCLUDING SAME

Disclosed is an additive for an electrolyte solution to improve the electrochemical properties of a lithium secondary battery. Especially, an electrolyte solution for a lithium secondary battery include: an electrolyte salt, an organic solvent, and one or more additives comprising a vinylene carbonate (VC) compound having a structure of Formula 1 and 4-allyl-2-methoxyphenyl fluoro sulfate having a structure of Formula 2: