METHOD OF PREPARING POSITIVE ACTIVE MATERIAL FOR RECHARGEABLE LITHIUM BATTERY USING IRON(III) OXIDE, POSITIVE ACTIVE MATERIAL FOR RECHARGEABLE LITHIUM BATTERY PREPARED BY USING THE METHOD, AND RECHARGEABLE LITHIUM BATTERY INCLUDING THE SAME

摘要

PURPOSE: A manufacturing method of anodic active material for lithium secondary battery using iron(III) oxide, anodic active material for the lithium secondary battery manufactured according to the manufacturing method, and a lithium secondary battery including thereof are provided to enhance profitability by using iron(III) oxide originated from waste iron, simplify manufacturing process, and solve waste resources transaction problem. CONSTITUTION: A manufacturing method of anodic active material for a lithium secondary battery comprises the following steps: forming trivalent iron ion by dissolving iron(III) oxide(Fe2O3) using a dissolution agent; forming divalent iron ion after reducing the trivalent iron ion as a reducing agent; forming precipitation by mixing the divalent iron ion, lithium source, phosphoric acid supply source, and solvent; and heat-treating the precipitation. The iron(III) oxide is originated from waste iron. The dissolution agent comprises acid, chelating agent, a combination thereof.