Method of preparing positive electrode active material precursor for lithium secondary battery, positive electrode active material precursor, and positive electrode active material, positive electrode, and lithium secondary battery which are prepared by using the precursor

A positive electrode active material precursor, a method of preparing the same, and a positive electrode active material, a positive electrode, and a lithium secondary battery prepared from the same. In some embodiments, a positive electrode active material precursor includes nickel, cobalt, and manganese, wherein the positive electrode active material precursor satisfies: Equation 1 (2.5≤C/C≤5.0) and Equation 2 (1.0≤C/C≤3.0), where Cis a crystalline size in a (001) plane, Cis a crystalline size in a (100) plane, and Cis a crystalline size in a (101) plane. The positive electrode active material precursor has particle growth of a (001) plane that is suppressed.