ELECTROLYTE ADDITIVE, ELECTROLYTE FOR LITHIUM SECONDARY BATTERY COMPRISING SAME, AND LITHIUM SECONDARY BATTERY

The present invention relates to an electrolyte solution additive including: a sultone-based compound; LiPOF; and a compound represented by Chemical Formula 1, an electrolyte solution for a lithium secondary battery, including the electrolyte solution additive, and a lithium secondary battery including the electrolyte solution for a lithium secondary battery.