NEGATIVE ACTIVE MATERIAL FOR RECHARGEABLE LITHIUM BATTERY AND RECHARGEABLE LITHIUM BATTERY COMPRISING SAME

摘要

Provided are a negative electrode active material for a lithium secondary battery and a lithium secondary battery comprising the same. The negative electrode active material comprises: a Si-base alloy; first graphite; and second graphite having the average diameter different from the first graphite. Provided is the negative electrode active material for a lithium secondary battery, which can improve cycle lifespan properties.