IP Library › Granted Patent US 12,334,566
Granted Patent B2
US 12,334,566 · App. 17/180,952 · Granted Jun 17, 2025

Coated fuel cell catalyst materials

Inventors: Jonathan Mailoa (Cambridge, MA); Sondra Hellstrom (East Palo Alto, CA); Georgy Samsonidze (San Francisco, CA); Soo Kim (Cambridge, MA); Mordechai Kornbluth (Brighton, MA); Karim Gadelrab (Boston, MA)
Assignee: Robert Bosch GmbH
H01M4/921H01M4/8663
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Quick Facts
Patent No.
US 12,334,566
App. No.
17/180,952
Granted
Jun 17, 2025
Kind
B2
Abstract

A fuel cell catalyst material includes metal catalyst particles formed of a metal material and a carbon-based coating composition at least partially coating at least some of the metal catalyst particles. The carbon-based coating composition includes a carbon network. The carbon-based coating composition is doped with a dopant. The carbon-based coating composition includes a number of defects formed by one or more vacated carbon atoms in the carbon network. The carbon-based coating composition is made from a non-aromatic carbon molecule.

Claims (24)

1. A fuel cell catalyst material comprising:

metal catalyst particles formed of a metal material; and

a carbon-based coating composition at least partially coating at least some of the metal catalyst particles, the carbon-based coating composition including a carbon network, the carbon-based coating composition doped with boron and nitrogen, the carbon-based coating composition including a number of defects formed by one or more vacated carbon atoms in the carbon network, the carbon-based coating composition made from a non-aromatic carbon molecule, the non-aromatic carbon molecule is chitosan, a sugar molecule, or a cellulose molecule, the carbon-based coating composition totally coats at least some of the metal catalyst particles, and the carbon-based coating composition has a thickness of 0.1 to 0.9 nanometers.

2. The fuel cell catalyst material of claim 1 , wherein the non-aromatic carbon molecule is chitosan.

3. The fuel cell catalyst material of claim 1 , wherein the non-aromatic carbon molecule is a sugar molecule.

4. The fuel cell catalyst material of claim 1 , wherein the non-aromatic carbon molecule is a cellulose molecule.

5. The fuel cell catalyst material of claim 1 , wherein the metal material is pure Pt, Pt-M alloy where M is a metal, a platinum group member (PGM) other than Pt, a PGM-M alloy system, a non-PGM catalyst material, or a combination thereof.

6. The fuel cell catalyst material of claim 1 , wherein the metal material is pure Pt.

7. The fuel cell catalyst material of claim 1 , wherein the metal material is Pt-M alloy where M is a metal.

8. The fuel cell catalyst material of claim 1 , wherein the metal material is a platinum group member other than Pt.

9. The fuel cell catalyst material of claim 1 , wherein the metal material is a PGM-M alloy system where PGM is a platinum group member and M is a metal.

10. The fuel cell catalyst material of claim 1 , wherein the metal material is a non-PGM catalyst material where PGM is a platinum group member.

11. A fuel cell catalyst material comprising:

metal catalyst particles formed of a metal material; and

a carbon-based coating composition at least partially coating at least some of the metal catalyst particles, the carbon-based coating composition including a carbon network, the carbon-based coating composition doped with boron and nitrogen, the carbon-based coating composition including a number of defects formed by one or more vacated carbon atoms in the carbon network, the carbon-based coating composition made from a non-aromatic carbon molecule, the non-aromatic carbon molecule is chitosan, a sugar molecule, or a cellulose molecule, the carbon-based coating composition totally coats at least some of the metal catalyst particles, and the carbon-based coating composition has a thickness of 0.1 to 0.5 nanometers.

12. The fuel cell catalyst material of claim 11 , wherein the non-aromatic carbon molecule is chitosan.

13. The fuel cell catalyst material of claim 11 , wherein the non-aromatic carbon molecule is a sugar molecule.

14. The fuel cell catalyst material of claim 11 , wherein the non-aromatic carbon molecule is a cellulose molecule.

15. The fuel cell catalyst material of claim 11 , wherein the metal material is pure Pt, Pt-M alloy where M is a metal, a platinum group member (PGM) other than Pt, a PGM-M alloy system, a non-PGM catalyst material, or a combination thereof.

16. The fuel cell catalyst material of claim 11 , wherein the metal material is pure Pt.

17. The fuel cell catalyst material of claim 11 , wherein the metal material is Pt-M alloy where M is a metal.

18. The fuel cell catalyst material of claim 11 , wherein the metal material is a platinum group member other than Pt.

19. The fuel cell catalyst material of claim 11 , wherein the metal material is a PGM-M alloy system where PGM is a platinum group member and M is a metal.

20. The fuel cell catalyst material of claim 11 , wherein the metal material is a non-PGM catalyst material where PGM is a platinum group member.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Feb 22, 2021
From: MAILOA, JONATHAN; HELLSTROM, SONDRA; SAMSONIDZE, GEORGY; KIM, SOO; KORNBLUTH, MORDECHAI; GADELRAB, KARIM
To: ROBERT BOSCH GMBH
Reel/Frame 055348/0626 →
Continuity (1)
Related Publication 20220271298A1 · Aug 25, 2022
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