POSITIVE ELECTRODE ACTIVE MATERIAL, METHOD OF PREPARING THE SAME, AND LITHIUM SECONDARY BATTERY USING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide a positive electrode active material which can prevent degradation of cycle characteristics according to repetitive discharge of a battery and improve thermal stability and rate characteristics.SOLUTION: Provided are a positive electrode active material in which a surface of layer-structured lithium transition metal composite oxide is coated with one or more indium-based compounds selected from among indium oxides and alloys containing indium, a method of preparing the same, and a lithium secondary battery using the same.