A LITHIUM NICKEL COMPLEX OXIDE, A PROCESS FOR PREPARING THE SAME AND A POSITIVE ELECTRODE ACTIVE MATERIAL FOR A SECONDARY BATTERY

摘要

A positive active material for secondary batteries, comprising a lithiumnickel composite oxide represented by the general formula: Liy-x1Ni1-x2MxO2 (wherein M represents an element selected from the group consisting of: Al, Fe, Co, Mn and Mg, x = x1 + x2, 0 x1 < 0.2, 0 < x2 0.5, 0 < x 0.5, and 0.9 y 1.3), wherein the crystals have been satisfactorily developed and are highly pure and the stability of high discharge capacity is excellent.