ANODE ACTIVE MATERIAL FOR LITHIUM SECONDARY BATTERY HAVING COATING LAYER OF CARBON AND NON-CARBON MATERIAL AND PREPARATION THEREOF

摘要

A negative electrode active material for a lithium secondary battery is provided to improve the capacity and lifespan of a battery by suppressing separation of active material components from an electrode plate when a lithium battery is charged and discharged. The negative electrode active material for a lithium secondary battery is prepared by the steps of: (1) dissolving a carbon material in an organic solvent to obtain a sol solution; (2) adding a non-carbon component-containing material on the periodic table, which is solid at ambient temperature, to the sol solution, followed by thereto adding an alkaline material and stirring the admixture to obtain a gel solution; (3) adding graphite powder to the gel solution and stirring the admixture to form a carbon material/non-carbon material composite gel coating layer on the surface of the graphite powder; and (4) drying and firing the coated graphite powder.