NEGATIVE ACTIVE MATERIAL FOR SECONDARY BATTERIES

摘要

The present invention relates to a negative electrode active material for a lithium secondary battery. More specifically, provided is a negative electrode active material for a lithium secondary battery, as an alloy containing Si, wherein an amorphous area is existed, or a micro crystalline area and the amorphous area are existed on matrix in the alloy, and the degree of amorphization of the amorphous area or the degree of amorphization of the micro crystalline area and the amorphous area is more than or equal to 30%.