Active material for negative electrode used in lithium-ion battery and method of manufacturing same

摘要

Disclosed is negative electrode active material for lithium ion batteries and a method for manufacturing the same. The active material includes a crystalline carbon core; and an amorphous or turbostratic carbon shell evenly covering the crystalline carbon core, the carbon shell having a thickness of 10-2000Å. The method includes the steps of chemically combining a crystalline carbon and an amorphous carbon precursor; removing remaining amorphous carbon precursor not reacted in the chemical combination; and heat-treating a chemical combination material of graphite and the amorphous carbon precursor obtained in the chemical combination.