COMPOSITE CATHODE ACTIVE MATERIAL, CATHODE AND LITHIUM BATTERY COMPRISING THE MATERIAL, AND PREPARATION METHOD THEREOF

摘要

PURPOSE: A composite positive electrode is provided to improve electric conductivity by improving dispersion of a compound with an olivine structure, thereby improving high voltage performance of a lithium battery. CONSTITUTION: A composite positive electrode active material comprises a compound with an olivine structure and an inorganic material. The inorganic material comprises one or more selected from metal carbon nitride and carbon nitride. The metal carbon nitride is represented by chemical formula 1: M"C_(1-a)N_a. In chemical formula 1, 0