METHOD FOR MANUFACTURING ANODE ACTIVE MATERIAL PRECURSOR IN LITHIUM SECONDARY BATTERY, ANODE ACTIVE MATERIAL PRECURSOR IN LITHIUM SECONDARY BATTERY MANUFACTURED THEREBY, AND METHOD FOR PREPARING LITHIUM METAL COMPOSITE OXIDE USING THE ANODE ACTIVE MATERIAL PRECURSOR AND LITHIUM METAL COMPOSITE OXIDE FOR ANODE ACTIVE MATERIAL IN LITHIUM SECONDARY BATTERY PREPARED THEREBY

摘要

The present invention provides a method for manufacturing a anode active material precursor in a lithium secondary battery, comprising the following steps: (a) preparing a nickel cobalt composite oxide by coprecipitation by mixing with a solution a mixed metal solution, which comprises compounds including nickel and compounds including cobalt, an ammonia aqueous solution as a complexing agent, and an alkaline aqueous solution which provides a hydroxyl group as a pH controlling agent; (b) introducing a metal element M to the nickel cobalt composite oxide prepared from the step (a), wherein the anode active material precursor in the lithium secondary battery is represented by Chemical Formula 1 below, and wherein the lithium metal composite oxide for the anode active material in the lithium secondary battery is represented by Chemical Formula 2 below. [Chemical Formula 1] [Ni_1-y-zCo_yM_z](OH)₂ (where in the Chemical Formula 1, M is a group 13 metal element and is one or a combination of two or more elements selected from a group consisting of B, Al, Ga, In, and Tl, and 0≤y≤0.25, 0≤z≤0.15). [Chemical Formula 2] Li_x[Ni_1-y-zCo_yM_z]O₂ (where in the Chemical Formula 2, M is group 13 metal element and is one or a combination of two or more elements selected from a group consisting of B, Al, Ga, In, and Tl, and 0.96≤x≤1.05, 0≤y≤0.25, 0≤z≤0.15).