NEGATIVE ELECTRODE ACTIVE MATERIAL FOR LITHIUM SECONDARY BATTERY

摘要

The present invention relates to a negative electrode active material for a lithium secondary battery, and more specifically provides a negative electrode active material for a lithium secondary battery, the material being characterised by comprising an alloy comprising Si, and by having an amorphous region or having a micro crystal region and an amorphous region on the matrix in the alloy, the amorphization degree of the amorphous region or the amorphization degree of the micro crystal region and the amorphous region being at least 30%.