Method for Preparing Positive Electrode Active Material Precursor for Lithium Secondary Battery

A bimodal-type positive electrode active material precursor comprising first positive electrode active material precursor particles and second positive electrode active material precursor particles having different average particle diameters (D50),

• wherein the first positive electrode active material precursor particles have an average particle diameter (D50) of 8 μm to 15 μm and have a core-shell structure, wherein the core-shell structure comprises a core portion having a nickel content of 60 mol % or greater based on a total number of moles of transition metals, and a shell portion formed on a surface of the core portion and having a different composition from the core portion;
• and
• the second positive electrode active material precursor particles have an average particle diameter (D50) of 1 μm to less than 8 μm.