Patent ID: 8741484

Claim:
A positive electrode active material comprising a layered composite crystalline active composition with a formula Li 1+x Ni α Mn β-δ Co γ A δ X μ O 2 , wherein x ranges from about 0.01 to about 0.3, α ranges from about 0.1 to about 0.4, β ranges from about 0.25 to about 0.65, γ ranges from 0.075 to about 0.4, δ ranges from about 0.01 to about 0.035, μ ranges from 0 to about 0.1, and wherein A is Mg, Ca, Sr, Ba, Zn, Cd, or combinations thereof and X is a transition metal or a combination thereof other than A, Ni, Mn and Co, and a stabilization coating over the active composition, wherein the material has a 10th cycle specific discharge capacity of at least about 240 mAh/g at a discharge rate of C/3 when discharged from 4.6 volts to 2.0 volts and wherein the 40th cycle specific discharge capacity is at least about 98% of the 10th cycle specific discharge capacity at room temperature at a discharge rate of C/3 and from 4.6 volts to 2.0 volts.