Patent ID: 8343390

Claim:
A powderous lithium transition metal oxide having a layered crystal structure Li 1+a M 1−a O 2±b M′ k S m with −0.03<a <0.06, b≈0, and 0≦m≦0.6, m being expressed in mol %, wherein M is a transition metal compound, comprising at least 95% of one or more elements selected from the group consisting of Ni, Mn, Co and Ti; wherein the powderous lithium transition metal oxide is a solid state solution and wherein M′ is present on the surface of the powderous oxide and comprises one or more elements selected from the group consisting of Ca, Sr, Y, La, Ce and Zr; and wherein either k=0 and M=Ni 1−c−d Mn c Co d , with 0<c<1, and 0<d<1; or 0.015<k<0.15, k being expressed in wt % of said lithium transition metal oxide; wherein for said powderous oxide, the X-ray diffraction peak at 44.5±0.3 degree, having as index 104, measured with K alpha radiation, has an FWHM value of ≦0.1 degree.