ELECTROLYTE ADDITIVE FOR LITHIUM SECONDARY BATTERY, ELECTROLYTE FOR LITHIUM SECONDARY BATTERY INCLUDING THE SAME, AND LITHIUM SECONDARY BATTERY INCLUDING ELECTROLYTE

Provided are an electrolyte additive for lithium secondary batteries, an electrolyte for lithium secondary batteries including the same, and a lithium secondary battery including the electrolyte, the additive including a compound represented by Formula 1 below: In Formula 1, Rto Rare as defined in the detailed description.