	US 12,230,797 B2
	High energy density olivine-based cathode materials
Soo Kim, Fremont, CA (US); Sookyung Jeong, San Jose, CA (US); Sun Ung Kim, Camas, WA (US); Tae Kyoung Kim, Albany, CA (US); and Ki Tae Park, Santa Clara, CA (US)
Assigned to Rivian IP Holdings, LLC, Irvine, CA (US)
Filed by Rivian IP Holdings, LLC, Irvine, CA (US)
Filed on May 25, 2022, as Appl. No. 17/824,259.
Prior Publication US 2023/0387408 A1, Nov. 30, 2023
Int. Cl. H01M 4/36 (2006.01); C01B 25/45 (2006.01); H01M 4/505 (2010.01); H01M 4/525 (2010.01); H01M 4/58 (2010.01); H01M 4/02 (2006.01)

CPC H01M 4/5825 (2013.01) [C01B 25/45 (2013.01); H01M 4/364 (2013.01); H01M 4/505 (2013.01); H01M 4/525 (2013.01); C01P 2002/50 (2013.01); C01P 2002/77 (2013.01); C01P 2006/40 (2013.01); H01M 2004/028 (2013.01)]

20 Claims

1. A cathode active material comprising a lithium manganese (Mn) iron (Fe) phosphate and further comprising a lithium metal phosphate that is Li_0-2CrP₂O₇, LiVPO₅, Li_0-1VP₂O₇, Li_1-2CoP₂O₇, or a combination of any two or more thereof, the lithium metal phosphate exhibiting a voltage that is greater than or equal to that of LiFePO₄and less than or equal to that of LiMnPO₄and an oxygen evolution that is less than or equal to LiFePO₄, wherein the lithium manganese iron phosphate has a mol ratio of Mn:Fe is from about 3:7 to about 9:1, the lithium manganese iron phosphate is an olivine structure, and the Mn and Fe in the olivine structure are present in an partially ordered sublattice or partially disordered sublattice.