US 12,463,212 B2
Process for making an electrode active material, and electrode active material
Heino Sommer, Ludwigshafen (DE); Maraike Ahlf, Ludwigshafen (DE); Jacob Haag, Beachwood, OH (US); Regina Vogelsang, Ludwigshafen (DE); and Fatih Cetinel, Ludwigshafen (DE)
Assigned to BASF SE, Ludwigshafen (DE)
Appl. No. 16/968,322
Filed by BASF SE, Ludwigshafen am Rhein (DE)
PCT Filed Jan. 31, 2019, PCT No. PCT/EP2019/052330
§ 371(c)(1), (2) Date Aug. 7, 2020,
PCT Pub. No. WO2019/154702, PCT Pub. Date Aug. 15, 2019.
Claims priority of application No. 18156095 (EP), filed on Feb. 9, 2018.
Prior Publication US 2021/0083285 A1, Mar. 18, 2021
Int. Cl. H01M 4/52 (2010.01); C01G 53/50 (2025.01); H01M 4/36 (2006.01); H01M 4/50 (2010.01); H01M 4/505 (2010.01); H01M 4/525 (2010.01); H01M 4/62 (2006.01); H01M 10/05 (2010.01); H01M 10/0525 (2010.01)
CPC H01M 4/525 (2013.01) [C01G 53/50 (2013.01); H01M 4/366 (2013.01); H01M 4/505 (2013.01); H01M 4/628 (2013.01); H01M 10/0525 (2013.01); C01P 2002/70 (2013.01); C01P 2004/04 (2013.01)] 14 Claims
 
1. A process for making a non-homogeneously coated electrode active material, the process comprising:
(a) providing an electrode active material according to the following formula
Li1+xTM1−xO2,
wherein TM is a combination of Ni, Co, optionally Mn, and optionally at least one metal selected from the group consisting of Al, Ti, and Zr,
x is in a range of from 0 to 0.2,
at least 60 mole-% of the transition metal of TM is Ni, and
said electrode active material has a residual moisture content in a range of from 50 to 1,000 ppm,
(b) treating said electrode active material with a metal alkoxide, metal halide, metal amide, or alkyl metal compound,
(c) treating the material obtained in (b) with moisture,
(d) repeating the sequence of (b) and (c) two to ten times, and
(e) performing a post-treatment by heating the material obtained after the last repetition of (d) at a temperature in a range of from 200 to 400° C.;
wherein the non-homogeneously coated electrode active material is not fully coated.