Negative active material for rechargeable lithium battery, method preparing the same and rechargeable lithium battery including the same

摘要

Disclosed is a negative active material for a rechargeable lithium battery including a core including a SiO 2 matrix and a Si grain and a coating layer continuously or discontinuously coating the core, wherein the coating layer includes SiC and C, and wherein the peak area ratio of SiC (111) plane to Si (111) plane during X-ray diffraction analysis (XRD) using CuK± ray ranges from 0.01 to 0.50.