Electrode coatings and components thereof

Patent metadata

Field	Value
Publication number	US-12062791-B2
Application number	US-202218054788-A
Country	US
Kind code	B2
Filing date	Nov 11, 2022
Priority date	Nov 11, 2022
Publication date	Aug 13, 2024
Grant date	Aug 13, 2024

Abstract

Provided herein is a cathode. The cathode can include a cathode active material. The cathode can include a coating disposed on the cathode active material. The coating can include LixM1-y1My2AFz(OH)u, where M1 is a first metal, M2 is a second metal, A is an anionic species, 1≤x≤2, 0≤y≤1, 0≤z≤1, and 0≤u≤1.

First claim

What is claimed is:

1. A cathode comprising:
a cathode active material; and
a coating disposed on the cathode active material, the coating comprising Li x M 1-y 1 M y 2 AF z (OH) u , wherein M 1 is a first metal, M 2 is a second metal, A is an anionic species, 1≤x≤2, 0<y<1, 0≤z≤1, and 0<u≤1.

2. The cathode of claim 1 , wherein M 1 is selected from Al, Ga, V, Fe, Mn, and Ti, and A is PO 4 .

3. The cathode of claim 1 , wherein a crystal structure of Li x M 1-y 1 M y 2 AF z (OH) u , is triclinic.

4. The cathode of claim 1 , Li x M 1-y 1 M y 2 AF z (OH) u , is arranged in a tavorite structure.

5. The cathode of claim 1 , wherein:
M 1 is selected from Mn, Fe, Co, Ni, V, and Cr; and
M 2 is independently selected from M 1 and is selected from Mn, Fe, Co, Ni, V, and Cr.

6. The cathode of claim 1 , wherein Li x M 1-y 1 M y 2 AF z (OH) u is thermally stable in a temperature range from 0° ° C. to 500° ° C.

7. The cathode of claim 1 , wherein a crystal structure of Li x M 1-y 1 M y 2 AF z (OH) u is triplite.

8. The cathode of claim 1 , wherein the cathode comprises one or more materials selected from LMFP, LMO, LiMO 2 , Li 1+x1 M 1−x1 O 2 , and Li 2 MnO 3 .

9. The cathode of claim 1 , wherein the coating is configured to reduce dissolution of manganese from the cathode compared to a cathode without the coating.

10. A method, comprising:
disposing a coating on a cathode active material of a cathode, the coating comprising Li x M 1-y 1 M y 2 AF z (OH) u , wherein M 1 is a first metal, M 2 is a second metal, A is an anionic species, 1≤x≤2, 0<y<1, 0≤z≤1, and 0<u≤1.

11. The method of claim 10 , comprising:
combining a first precursor of the coating, a second precursor of the coating, and optionally a third precursor of the coating, with a cathode active material; and
heating the coating precursors and the cathode active material.

12. The method of claim 10 , comprising:
combining FePO 4 , LiF, and a cathode active material; and
heating the FePO 4 , LiF, and cathode active material at a temperature in a range from 500° ° C. to 600° C.

13. The method of claim 10 , comprising:
combining MnSO 4 ·H 2 O, LiF, and a cathode active material; and
heating the MnSO 4 ·H 2 O, LiF, and cathode active material at a temperature in a range from 300° ° C. to 600° C.

14. The method of claim 10 , wherein the Li x M 1-y 1 M y 2 AF z (OH) u is arranged in a tavorite structure.

15. The cathode of claim 1 , wherein the coating comprises an inactive coating.

16. The cathode of claim 1 , wherein A is selected from P 2 O 7 , F, and SO 4 .

17. A cathode comprising:
a cathode active material; and
a coating disposed on the cathode active material, the coating comprising Li x M 1-y 1 M y 2 AF z (OH) u , wherein M 1 is a first metal, M 2 is a second metal, A is an anionic species, 1≤x≤2, 0<y<1, 0≤z≤1, and 0≤u≤1, and wherein a crystal structure of Li x M 1-y 1 M y 2 AF z (OH) u is selected from a triclinic structure, a tavorite structure, and a triplite structure.

18. The cathode of claim 17 , wherein M′ is selected from Al, Ga, V, Fe, Mn, and Ti, and A is PO 4 .

19. The cathode of claim 17 , wherein:
M 1 is selected from Mn, Fe, Co, Ni, V, and Cr; and
M 2 is independently selected from M 1 and is selected from Mn, Fe, Co, Ni, V, and Cr.

20. The cathode of claim 17 , wherein 0<u≤1.

Assignees

• Rivian Ip Holdings Llc

Inventors

• Kim Soo
• Kim Yumi
• Talebiesfandarani Majid
• Shin Woochul
• Kim Tae Kyoung
• Park Ki Tae

Classifications

• B60L50/60

  using power supplied by batteries (in combination with fuel cells B60L50/75) · CPC title

• H01M10/052

  Li-accumulators · CPC title

• H01M4/1397

  of electrodes based on inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy · CPC title

• H01M4/1391

  of electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx · CPC title

• H01M4/131

  Electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx · CPC title