US 12,224,440 B2
Process for making a coated cathode active material, and coated cathode active material
Matteo Bianchini, Bayreuth (DE); Pascal Hartmann, Ludwigshafen (DE); Torsten Brezesinski, Eggenstein-Leopoldshafen (DE); Katja Ramona Kretschmer, Karlsruhe (DE); and Soeren Lukas Dreyer, Karlsruhe (DE)
Assigned to BASF SE, Ludwigshafen Am Rhein (DE); and KARLSRUHER INSTITUT FUER TECHNOLOGIE, Karlsruhe (DE)
Appl. No. 18/564,734
Filed by BASF SE, Ludwigshafen am Rhein (DE); and Karlsruher Institut Für Technologie, Karlsruhe (DE)
PCT Filed Jun. 14, 2022, PCT No. PCT/EP2022/066240
§ 371(c)(1), (2) Date Nov. 28, 2023,
PCT Pub. No. WO2023/274723, PCT Pub. Date Jan. 5, 2023.
Claims priority of application No. 21181932 (EP), filed on Jun. 28, 2021.
Prior Publication US 2024/0282961 A1, Aug. 22, 2024
Int. Cl. H01M 4/58 (2010.01); H01M 4/131 (2010.01); H01M 4/36 (2006.01); H01M 4/505 (2010.01); H01M 4/02 (2006.01)
CPC H01M 4/5825 (2013.01) [C01G 53/50 (2013.01); H01M 4/131 (2013.01); H01M 4/366 (2013.01); H01M 4/505 (2013.01); C01P 2002/52 (2013.01); C01P 2004/80 (2013.01); C01P 2006/40 (2013.01); H01M 2004/028 (2013.01)] 10 Claims
 
1. A process for making a coated cathode active material, wherein said process comprises the following steps:
(a) providing an electrode active material according to general formula Li1+xTM1−xO2, wherein TM is a combination of metals according to formula (I), and x is in a range of from zero to 0.2, with a moisture content in a range of from 500 to 1,500 ppm,

OG Complex Work Unit Chemistry
with
a being in a range of from 0.3 to 0.4,
b being in a range of from zero to 0.1,
c being in a range of from 0.6 to 0.7, and
d being in a range of from zero to 0.1,
M is Al or Ti or Zr or Mg, and

OG Complex Work Unit Math
(b) reacting said electrode active material with a silicon alkoxide and an alkyl aluminum compound in one or more sub-steps, and
(c) heat-treating the material obtained in step (b) in an oxygen-containing atmosphere at a temperature in a range of from 100 to 400° C. for 10 minutes to 4 hours.