Method of preparing cathode active material precursor for lithium rechargeable battery, cathode active material precursor for lithium rechargeable battery prepared thereby, and cathode active material formed using the cathode active material precursor

摘要

The present invention relates to a method of preparing a cathode active material precursor for a lithium rechargeable battery, the cathode active material precursor for the lithium rechargeable battery prepared thereby, and a cathode active material formed using the cathode active material precursor.;According to the present invention, the method of preparing a cathode active material precursor for a lithium secondary battery controls the concentration of a concentration gradient part and a shell part in a precursor to obtain a desired concentration of a transition metal in the shell part. As a result, a metal composition is distributed in a continuous concentration gradient from the interface between the core part and the shell part to the surface of the cathode active material, thereby a cathode active material with excellent thermal stability.