Patent ID: 7556655

Claim:
A method of producing Li y [Ni x Co 1−2x Mn x ]O 2 wherein 0.1≦x≦0.375, and 0.9≦y≦1.3, the method comprising: grinding a dry precipitate of [Ni x Co 1−2x Mn x ]OH 2 with a stoichiometric amount of LiOH.H 2 O or Li 2 CO 3 and at least one boron compound as sintering agent to form a resulting mixture; and heating the resulting mixture until a sufficiently dense composition of Li y [Ni x Co 1−2 Mn x ]O 2 having a pellet density of from about 3.3 to about 3.5 g/m 3 is obtained for use in a lithium-ion battery, to form a densified composition of Li y [Ni x Co 1−2x Mn x ]O 2 , wherein the total amount of boron compound(s) is greater than 0.2% and up to about 10% of the total weight of the mixture.