| abstract |
The present invention provides a core material having a layered crystal structure composed of elements Li, metal M and oxygen; And a lithium metal oxide powder to be used as a cathode material in a rechargeable battery, consisting of a surface layer composed of a mixture of an element of the core material and an inorganic N-based oxide, wherein the Li content is stoichiometrically controlled , Metal M is represented by the formula M = Co 1 - a M ' a , wherein a is 0 or more and 0.05 or less, M' is at least one metal of the group consisting of Al, Ga and B, and N is Mg, Ti A lithium metal oxide powder is at least one metal of the group consisting of Fe, Cu, Ca, Ba, Y, Sn, Sb, Na, Zn, Zr and Si. |