POSITIVE ACTIVE MATERIAL, METHOD OF PREPARING THE SAME, AND LITHIUM BATTERY USING THE SAME

摘要

PURPOSE: A positive active material has excellent high temperature and low temperature lifetime by improving the structural stability of a spinel structure, prevents the oxidation change of manganese during a sintering process, and prevents the electrolyte elution of manganese ion. CONSTITUTION: A positive active material is represented by chemical formula 1: Li_(1+α)Ni_xMn_(2-x)O_4 and includes a spinel lithium nickel manganese oxide satisfying formula 1: 8.1725Å < lattice constant a < 8.1810Å. In the chemical formula, x is 0