	US 11,862,784 B2
	Process for making a cathode active material for a lithium ion battery
Michael Metzger, Munich (DE); Hans Beyer, Munich (DE); Johannes Sicklinger, Munich (DE); Daniel Pritzl, Munich (DE); Benjamin Strehle, Munich (DE); Hubert Gasteiger, Munich (DE); Hadar Sclar, Ramat-Gan (IL); Evan Erickson, Ramat-Gan (IL); Francis Amalraj Susai, Ramat-Gan (IL); Judith Grinblat, Ramat-Gan (IL); Doron Aurbach, Bne Brak (IL); and Boris Markovsky, Petah-Tikwa (IL)
Appl. No. 16/626,939
Filed by BASF SE, Ludwigshafen am Rhein (DE)
PCT Filed Jun. 22, 2018, PCT No. PCT/EP2018/066725 § 371(c)(1), (2) Date Dec. 27, 2019, PCT Pub. No. WO2019/002116, PCT Pub. Date Jan. 3, 2019.
Claims priority of application No. 17178267 (EP), filed on Jun. 28, 2017; and application No. 18154214 (EP), filed on Jan. 30, 2018.
Prior Publication US 2020/0144594 A1, May 7, 2020
Int. Cl. H01M 4/04 (2006.01); H01M 4/505 (2010.01); H01M 4/525 (2010.01); H01M 10/0525 (2010.01); C01G 53/00 (2006.01); C01G 45/12 (2006.01); H01M 10/052 (2010.01)

CPC H01M 4/0471 (2013.01) [C01G 45/125 (2013.01); C01G 53/50 (2013.01); H01M 4/505 (2013.01); H01M 4/525 (2013.01); H01M 10/0525 (2013.01); C01P 2004/82 (2013.01); C01P 2006/12 (2013.01); H01M 10/052 (2013.01)]

11 Claims

1. A process for making a cathode active material for a lithium ion battery, said process comprising:

(a) synthesizing a mixed oxide of formula Li_1+xTM_1−xO₂at a temperature ranging from 750 to 1000° C. in an oxidizing atmosphere, wherein TM is a combination of two or more transition metals selected from the group consisting of Mn, Co and Ni and, optionally, at least one more metal selected from the group consisting of Ba, Al, Zr, W, Fe, Cr, K, Mo, Nb, Mg, Na and V, and x ranges from zero to 0.2,

(b) cooling down the mixed oxide obtained from (a) to a temperature ranging from 100 to 400° C.,

(c) forming sulfate and/or sulfite on a surface of the mixed oxide by reacting the mixed oxide with at least one reactant selected from the group consisting of SO₂and SO₃at the temperature of 100 to 400° C., and

(d) cooling down to a temperature of 50° C. or below.