Patent ID: 8535832

Claim:
A lithium ion battery positive electrode material comprising a lithium metal oxide coated with a metal/metalloid oxide coating composition, wherein the lithium metal oxide can be approximately represented by a formula Li 1+a Ni α Mn β Co γ A δ O 2−z F z , where a ranges from about 0.05 to about 0.3, a ranges from 0 to about 0.4, β range from about 0.2 to about 0.65, γ ranges from 0 to about 0.46, δ ranges from about 0 to about 0.15, z ranges from 0 to about 0.2 with the proviso that both α and γ are not zero, and where A is Mg, Sr, Ba, Cd, Zn, Al, Ga, B, Zr, Ti, Ca, Ce, Y, Nb, Cr, Fe, V, or combinations thereof, wherein the coating composition comprises less than 2 weight percent of the positive electrode material, and wherein after the material is activated in the first cycle to a charge of 4.6V at a rate of C/10, the positive electrode material has a specific discharge capacity of at least about 260 mAh/g with a discharge rate of C/3 when discharged from 4.6V to 2.0 V at room temperature and a specific discharge capacity of at least about 230 mAh/g with a discharge rate of C/3 at the 50th charge/discharge cycle when discharged from 4.6V to 2.0 V at room temperature.