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

摘要

The present invention relates to a positive electrode active material for a lithium secondary battery, and to a lithium secondary battery comprising same. More particularly, the present invention relates to a positive electrode active material for a lithium secondary battery in which a lithium composite oxide having a composition of LiNi1-xMxO2 (wherein, M represents one or a combination of two elements selected from Co, Al, Mn, Mg, Fe, Cu, Ti, Sn, and Cr, and wherein 0.96 = x = 1.05) is surface-modified using a carbon or organic compounds, to thereby achieve improved stability and improved efficiency at a high rate as compared to conventional positive electrode active materials. The present invention also relates to the lithium secondary battery comprising said positive electrode active material.