US 11,942,634 B2
Process for making a partially coated electrode active material, and electrode active material
Jacob Haag, Beachwood, OH (US); Maraike Ahlf, Ludwigshafen (DE); and Heino Sommer, Ludwigshafen (DE)
Assigned to BASF SE, Ludwigshafen am Rhein (DE)
Appl. No. 16/963,714
Filed by BASF SE, Ludwigshafen am Rhein (DE)
PCT Filed Jan. 31, 2019, PCT No. PCT/EP2019/052329
§ 371(c)(1), (2) Date Jul. 21, 2020,
PCT Pub. No. WO2019/154701, PCT Pub. Date Aug. 15, 2019.
Claims priority of application No. 18156077 (EP), filed on Feb. 9, 2018.
Prior Publication US 2021/0083284 A1, Mar. 18, 2021
Int. Cl. H01M 4/139 (2010.01); C01F 7/02 (2022.01); H01M 4/131 (2010.01); H01M 4/134 (2010.01); H01M 4/1391 (2010.01); H01M 4/1395 (2010.01); H01M 4/36 (2006.01); H01M 4/505 (2010.01); H01M 4/525 (2010.01); H01M 10/0525 (2010.01)
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.