PROCESS FOR PREPARATION OF ANODE ACTIVE MATERIAL

摘要

PURPOSE: A manufacturing method of a negative electrode active material is provided to manufacture a negative electrode active material of a unique structure in which a composite coating layer with high uniformity is formed on an outside of a crystalline carbon-based core. CONSTITUTION: A manufacturing method of a negative electrode active material consisting of low crystalline carbon and/or amorphous carbon, and metal and/or non-metal capable of absorbing and discharging ions comprises: a step of mixing the metal and/or nonmetal capable of absorbing and discharging ions with a precursor of a raw material of the low crystalline and/or amorphous carbon; a step of preparing a mixture for coating by refining the mixture; a step of preparing a core-shell-precursor in which a core comprising crystalline carbon-based material coated with a raw material for coating by mixing the mixture for coating with the crystalline carbon-based material; and a step of carbonizing the low crystalline carbon and/or amorphous carbon raw material by sintering the core-shell precursor.