US 12,218,352 B2
Lithium fluoride-containing coatings for cathode active materials in Li-ion batteries
Hongli Dai, Los Altos, CA (US); Huiming Wu, San Jose, CA (US); Chi-Kai Lin, Sunnyvale, CA (US); Michael J. Erickson, San Jose, CA (US); Martin Bettge, Santa Clara, CA (US); Xiaoping Wang, Naperville, IL (US); Yan Li, Westmont, IL (US); Yanjie Cui, Arlington Heights, IL (US); James A. Gilbert, Bolingbrook, IL (US); Zhenzhen Yang, Godfrey, IL (US); Anh D. Vu, Lemont, IL (US); Arthur Jeremy Kropf, Westmont, IL (US); Hakim H. Iddir, Hoffman Estates, IL (US); Christopher S. Johnson, Naperville, IL (US); and John David Carter, Bolingbrook, IL (US)
Assigned to Apple Inc., Cupertino, CA (US)
Filed by Apple Inc., Cupertino, CA (US)
Filed on Apr. 9, 2021, as Appl. No. 17/226,511.
Claims priority of provisional application 63/007,781, filed on Apr. 9, 2020.
Prior Publication US 2021/0320298 A1, Oct. 14, 2021
Int. Cl. H01M 4/58 (2010.01); H01M 4/04 (2006.01); H01M 4/50 (2010.01); H01M 4/505 (2010.01); H01M 4/52 (2010.01); H01M 4/525 (2010.01); H01M 10/05 (2010.01); H01M 10/0525 (2010.01)
CPC H01M 4/582 (2013.01) [H01M 4/0471 (2013.01); H01M 4/505 (2013.01); H01M 4/525 (2013.01); H01M 10/0525 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A plurality of particles, each particle comprising:
a material comprising:
0.95 to 1.30 mole fraction Li;
at least 0.60 and less than 1.00 mole fraction Co;
up to 10,000 ppm Al;
1.90 to 2.10 mole fraction O; and
up to 0.30 mole fraction M;
wherein M is at least one element selected from B, Na, Mg, P, Ti, Ca, V, Cr, Fe, Mn, Ni, Cu, Zn, Al, Sc, Y, Ga, Zr, Ru, Mo, La, Si, Nb, Ge, In, Sn, Sb, Te, and Ce; and
a surface composition comprising:
a mixture of LiF and a metal fluoride, wherein an amount of fluorine (F) is 500-5000 ppm; wherein the metal fluoride comprises a material selected from the group consisting of AlF3, CaF2, MgF2, and LaF2; and
a metal oxide comprising a material selected from the group consisting of TiO2, MgO, La2O3, CaO, and Al2O3, wherein an amount of the metal oxide is 1000-20000 ppm.