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

摘要

PURPOSE: A negative electrode active material for lithium secondary batteries is provided to provide a battery with excellent cycle performance. CONSTITUTION: A negative electrode active material(100) for lithium secondary batteries comprises a crystalline carbon material(105) which includes pores(103); a carbon-nanoparticle composite which includes amorphous nanoparticles(107) which are dispersed inside the pores and/or surface of the crystalline carbon material; and a metal oxide layer(207) which is coated on the surface in a film shape. Half width of the crystal surface with the highest peak by X-ray diffraction is 0.35 ° or more. The crystal carbon material comprises graphite, artificial graphite, or a mixture thereof.