Positive electrode additive for a lithium secondary battery, a method of manufacturing same, and a positive electrode for a lithium secondary battery including same

A method of manufacturing a positive electrode additive for a lithium secondary battery, which is used to manufacture a positive electrode for a lithium secondary battery, the method comprising:

• a core preparation operation of preparing a lithium (Li)-based additive core;
• a coating solution preparation operation of preparing a coating solution to form a coating layer composed of NbOXCy (0≤x≤2.5 and 0≤y≤1;
• where Nb=niobium, O=oxygen, C=carbon);
• and
• a coating operation of coating a surface of the additive core with the coating solution and forming a coating layer.

A positive electrode for a lithium secondary battery, the positive electrode including a positive electrode additive comprising:

• a lithium (Li)-based additive core;
• and
• a coating layer of NbOXCy (0≤x≤2.5 and 0≤y≤1;
• where Nb=niobium, O=oxygen, C=carbon) formed on a surface of the additive core.