| abstract |
A lithium metal oxide powder for use as a cathode material in a rechargeable battery, consisting of a core material and a surface layer, the core having a layered crystal structure consisting of the elements Li, a metal M and oxygen, wherein the Li to M molar ratio is between 0.98 and 1.01, and preferably between 0.99 and 1.00,wherein the metal M has the formula M=Co -a M' a, with 0≤a≤0.05, wherein M' is either one or more metals of the group consisting of Al, Ga and B; and the surface layer consisting of a mixture of the elements of the core material and inorganic N-and N'-based oxides, wherein N is either one or more metals of the group consisting of Mg, Ti, Fe, Cu, Ca, 10 Ba, Sn, Sb, Na, Zn, and Si; and wherein N' is either one or more metals of the group consisting of Y, Zr, Nb, Mo, Ru, Rh, Pd, Ag, Cd, Sc, Ce,Pr, Nd, Gd, Dy, and Er. |