POSITIVE ELECTRODE ADDITIVE FOR LITHIUM SECONDARY BATTERY, METHOD FOR PREPARING THE SAME AND POSITIVE ELECTRODE FOR LITHIUM SECONDARY BATTERY INCLUDING THE SAME

Disclosed are a positive electrode additive material for a lithium secondary battery having an enhancement in atmospheric stability, a method for preparing the same, and a positive electrode for a lithium secondary battery including the same. The positive electrode material includes an core including a lithium component, and a coating layer formed on a surface of the core and including a compound having a formula of LiM′Owherein M′ is Ta or Nb.