LITHIUM SECONDARY BATTERY WITH ENHANCED SAFETY

An electrolyte composition and a lithium secondary battery including the same are disclose herein. The electrolyte composition has improved high temperature safety. In some embodidments, the electrolyte composition includes an additive including a compound represented by Formula 1, it may reinforce an SEI layer on the surface of an electrode, thereby having advantages of improved storage and lifetime characteristics at a high temperature and a decreased amount of gas generated in the battery.