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

The present disclosure provides an electrolyte for a lithium secondary battery capable of improving the lifespan characteristics and output characteristics of a high capacity lithium secondary battery and a lithium secondary battery including the same. The electrolyte for a lithium secondary battery, according to an embodiment of the present disclosure, is an electrolyte for a lithium secondary battery including a lithium salt, a solvent, and a functional additive agent, in which the functional additive agent includes a cathode film additive agent, (4-allyl-2-methoxyphenoxy) trimethylsilane, represented by the following formula: