| abstract |
A lithium metal oxide powder for use as a cathode material in a rechargeable battery comprising a core material and a surface layer, wherein the core has a layered crystal structure consisting of element Li, metal M and oxygen, wherein the Li to M molar ratio is 0.98 To 1.01, preferably from 0.99 to 1.00, wherein the metal M has the formula M = Co 1-a M ' a wherein 0? A? 0.05; Wherein M 'is one or more metals of the group consisting of Al, Ga and B; Wherein the surface layer comprises a mixture of an element of the core material and an inorganic N and N 'base oxide wherein N is at least one of the group consisting of Mg, Ti, Fe, Cu, Ca, Ba, Sn, Sb, Metal; Wherein N 'is at least one metal selected from the group consisting of Y, Zr, Nb, Mo, Ru, Rh, Pd, Ag, Cd, Sc, Ce, Pr, Nd, Gd, . |