CPC H01M 4/525 (2013.01) [C01F 7/02 (2013.01); H01M 4/131 (2013.01); H01M 4/134 (2013.01); H01M 4/1391 (2013.01); H01M 4/1395 (2013.01); H01M 4/364 (2013.01); H01M 4/366 (2013.01); H01M 4/505 (2013.01); H01M 10/0525 (2013.01)] | 19 Claims |
1. A process for making a non-homogeneously coated electrode active material, the process comprising:
(a) treating an electrode active material with a metal alkoxide or metal halide or metal amide or alkyl metal compound, to obtain a material;
(b) treating the material obtained in (b) with moisture; and
(c) repeating the treating (a) and the treating (b) twice to 4 times, wherein in a last sequence of the treating (a) and the treating (b), moisture is at least partially substituted by ozone,
wherein the electrode active material subjected to the treating has a formula
Li1+xTM1−xO2,
wherein TM is a combination of Ni, Co, and, optionally, Mn, and, optionally, Al, Ti, Mo, W, and/or Zr in metallic form, and x is in a range of from zero to 0.2,
wherein at least 60 mole-% of a transition metal of TM is Ni, and
wherein the electrode active material has a residual moisture content in a range of from 50 to 1,000 ppm.
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