US 11,862,795 B2
Method for processing Ni-rich electrode active materials
Christoph Erk, Ludwigshafen (DE); Thomas Letzelter, Ludwigshafen (DE); Markus Hoelzle, Ludwigshafen (DE); and Carsten Sueling, Ludwigshafen (DE)
Assigned to BASF SE, Ludwigshafen am Rhein (DE)
Appl. No. 17/254,559
Filed by BASF SE, Ludwigshafen am Rhein (DE)
PCT Filed Jun. 17, 2019, PCT No. PCT/EP2019/065862
§ 371(c)(1), (2) Date Dec. 21, 2020,
PCT Pub. No. WO2020/002024, PCT Pub. Date Jan. 2, 2020.
Claims priority of application No. 18180290 (EP), filed on Jun. 28, 2018.
Prior Publication US 2021/0376318 A1, Dec. 2, 2021
Int. Cl. H01M 4/525 (2010.01); C01G 53/00 (2006.01); H01M 4/505 (2010.01); H01M 4/02 (2006.01)
CPC H01M 4/525 (2013.01) [C01G 53/50 (2013.01); H01M 4/505 (2013.01); C01P 2002/52 (2013.01); C01P 2006/12 (2013.01); C01P 2006/40 (2013.01); H01M 2004/021 (2013.01); H01M 2004/028 (2013.01)] 8 Claims
 
1. A process for modifying an electrode active material of formula Li1+xTM1−xO2,
wherein TM is a combination of metals of formula (I a) or (I b)
(NiaCobMnc)1−dM1d  (I a)
wherein a+b+c=1,
a is in the range of from 0.75 to 0.95,
b is in the range of from 0.025 to 0.2,
c is in the range of from 0.025 to 0.2,
d is in the range of from zero to 0.1,
M1 is at least one of Ba, Mg, Al, W, Mo, Ti, and Zr, and
x is in the range of from −0.05 to +0.2, and
(NiaCobAle)1−dM2d  (I b)
wherein a+b+c=1,
a is in the range of from 0.75 to 0.95,
b is in the range of from 0.025 to 0.2,
e is in the range of from 0.025 to 0.2,
d is in the range of from zero to 0.1, and
M2 is at least one of W, Mo, Ti, and Zr,
wherein said process comprises:
(a) treating said Li1+xTM1−xO2 with an aqueous medium with a pH value in the range of at least 5 to up to 14, and
(b) removing said aqueous medium from treated Li1+xTM1−xO2 by way of a solid-liquid separation, and
wherein the treating (a) and the removing (b) are carried out simultaneously.