| 摘要 |
Disclosed is a positive active material for a lithium rechargeable battery, a method of preparing the same, and a lithium rechargeable battery comprising the same. The positive active material has an I<SUB>(003)</SUB>/I<SUB>(104) </SUB>intensity ratio of between 1.15 to 1 and 1.21 to 1 in an X ray diffraction pattern using CuKalpha ray, wherein I<SUB>(003)</SUB>/I<SUB>(004) </SUB>is the X-ray diffraction intensity of the (003) plane divided by the X-ray diffraction intensity of the (104) plane. The compound is represented by the formula: <?in-line-formulae description="In-line Formulae" end="lead"?>Li<SUB>x</SUB>Ni<SUB>y</SUB>Co<SUB>z</SUB>Mn<SUB>1-y-z-q</SUB>X<SUB>q</SUB>O<SUB>2</SUB><?in-line-formulae description="In-line Formulae" end="tail"?> wherein x>=1.05, 0<y<0.35, 0<z<0.35, X is Al, Mg, Sr, Ti or La, and 0<=q<0.1. |
