Precursor of a cathode active material for a lithium secondary battery, cathode active material, method for manufacturing the cathode active material, and lithium secondary battery including the cathode active material

Abstract

Disclosed are a precursor for a rechargeable lithium battery, a positive active material including the same, a preparation method thereof, and a rechargeable lithium battery including the positive active material. More particularly, the present invention relates to a precursor including a sheet-shaped plate having a thickness of about 1 nm to about 30 nm and that is represented by the following Chemical Formula 1. NixCoyMn1-x-y-zMz(OH)2  [Chemical Formula 1] In the above Chemical Formula 1, 0<x<1, 0≦y<1, 0.5≦1-x-y-z, and 0≦z<1, and M is at least one kind of metal selected from the group consisting of Al, Mg, Fe, Cu, Zn, Cr, Ag, Ca, Na, K, In, Ga, Ge, V, Mo, Nb, Si, Ti, and Zr.

Dependencies are inferred from the claim text.