US 12,119,475 B2
Process for making an at least partially coated electrode active material
Zhenji Han, Amagasaki (JP); Junji Kashiwagi, Yamaguchi (JP); Suhao Wei, Hyogo (JP); Jumpei Nakayama, Yamaguchi (JP); Daisuke Morita, Yamaguchi (JP); and Martin Schulz-Dobrick, Heidelberg (DE)
Assigned to BASF SE, Ludwigshafen Am Rhein (DE)
Appl. No. 17/250,955
Filed by BASF SE, Ludwigshafen (DE)
PCT Filed Sep. 20, 2019, PCT No. PCT/EP2019/075354
§ 371(c)(1), (2) Date Apr. 1, 2021,
PCT Pub. No. WO2020/069886, PCT Pub. Date Apr. 9, 2020.
Claims priority of application No. 18198187 (EP), filed on Oct. 2, 2018; and application No. 19164029 (EP), filed on Mar. 20, 2019.
Prior Publication US 2021/0367222 A1, Nov. 25, 2021
Int. Cl. H01M 4/1391 (2010.01); H01M 4/04 (2006.01); H01M 4/131 (2010.01); H01M 4/36 (2006.01); H01M 4/505 (2010.01); H01M 4/525 (2010.01); H01M 4/62 (2006.01); H01M 10/0525 (2010.01)
CPC H01M 4/0402 (2013.01) [H01M 4/1391 (2013.01); H01M 4/366 (2013.01); H01M 4/505 (2013.01); H01M 4/525 (2013.01); H01M 4/623 (2013.01); H01M 10/0525 (2013.01); H01M 4/0416 (2013.01); H01M 4/0471 (2013.01); H01M 4/131 (2013.01)] 13 Claims
 
1. A process for making an at least partially coated electrode active material comprising the steps of:
(a) providing an electrode active material according to general formula Li1+xTM1−xO2, wherein TM is a combination of metals according to general formula (I a)
(NiaCobMnc)1−dMd  (I a)
with
a ranging from 0.60 to 0.99;
b ranging from 0.01 to 0.20;
c ranging from zero to 0.20; and
d ranging from zero to 0.10;
M is at least one of Al, Mg, Ti, Nb, Mo, W, and Zr; and
a+b+c=1;
and x ranges from zero to 0.20;
or wherein TM corresponds to the general formula (I b)
(Nia*COb*Ale*)1−d*M2d*  (I b)
with
a* ranging from 0.75 to 0.95;
b* ranging from 0.025 to 0.2;
e* ranging from 0.01 to 0.2; and
d* ranging from zero to 0.1;
M2 is at least one of W, Mo, Ti and Zr; and
a*+b*+e*=1;
and x ranges from −0.05 to 0.2;
(b) treating the electrode active material from step (a) with an aqueous formulation comprising a compound of Me wherein Me is chosen from Sb, Mg, Zn, Sn, and Te, wherein the compound of Me has an average particle diameter (D50) in a range of 200 nm to 10 μm dispersed in water;
(c) separating off water from the aqueous formulation to form a residue; and
(d) treating the residue thermally under an oxygen-containing atmosphere.