POSITIVE ELECTRODE ACTIVE MATERIAL FOR A LITHIUM SECONDARY BATTERY, METHOD FOR PREPARING SAME, AND LITHIUM SECONDARY BATTERY COMPRISING SAME

Provided is a high-capacity positive electrode active material, and more particularly, a high-capacity positive electrode active material for a lithium secondary battery containing a composite oxide of the following Chemical Formula 1. €ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ[Chemical Formula 1]€ƒ€ƒ€ƒ€ƒ€ƒLi x Ni y Fe z Mn w O 2 (Where, x, y, and z satisfy the following Equations, respectively; 1‰¤x‰¤1.8, 0