PROCESS FOR PREPARATION OF ANODE ACTIVE MATERIAL

摘要

PURPOSE: A manufacturing method of a negative electrode active material is provided to effectively manufacture a negative electrode active material with an unique structure that a composite coating layer comprising low crystalline or amorphous carbon material, and hydrophilic material with high uniformity is formed on an outside of core comprising crystalline carbon based material. CONSTITUTION: A manufacturing method of a negative electrode active comprises: a step of preparing a mixture for coating by mixing hydrophilic material into a precursor of a raw material for a material selected from low crystalline carbon and amorphous carbon, and preparing a mixture for coating by purifying the mixture; a step of manufacturing a core-shell precursor, in which a raw mixture for coating is spread on crystalline carbon based material-containing core, by mixing the coating mixture with a crystalline carbon based material; and a step of carbonizing raw material for low crystalline and/or amorphous carbon material to a low crystalline and amorphous carbon material by sintering the core-shell precursor.