LITHIUM-NICKEL COMPLEX OXIDE FOR CATHODE MATERIAL OF SECONDARY BATTERIES WITH NON-AQUEOUS ELECTROLYTE, A PROCESS FOR PREPARING THE SAME AND CATHODE MATERIAL CONTAINING THE SAME

摘要

The present invention relates to a positive electrode active material for a non-aqueous electrolyte secondary battery, and more particularly, Li ₂ Ni _x M _a O ₂ (wherein M is an element selected from the group consisting of Al, Mg, Si, P and Ga, x + a = 1, and 0? A? 0.1.). The lithium-nickel composite oxide may be used alone or in combination with a conventional lithiated transition metal oxide material as a cathode active material for a secondary battery of a non-aqueous electrolyte.;The positive electrode active material according to the present invention, when applied to a non-aqueous electrolyte secondary battery, provides a lithium ion reservoir or extra lithium ion source suitable for overcoming the irreversible capacity loss typically encountered in current lithium ion batteries. .