Coated fuel cell catalyst materials

Patent metadata

Field	Value
Publication number	US-12334566-B2
Application number	US-202117180952-A
Country	US
Kind code	B2
Filing date	Feb 22, 2021
Priority date	Feb 22, 2021
Publication date	Jun 17, 2025
Grant date	Jun 17, 2025

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.

First claim

What is claimed is:

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.

Assignees

• Bosch Gmbh Robert

Inventors

• Mailoa Jonathan
• Hellstrom Sondra
• Samsonidze Georgy
• Kim Soo
• Kornbluth Mordechai
• Gadelrab Karim

Classifications

• H01M4/8663 Primary

  Selection of inactive substances as ingredients for catalytic active masses, e.g. binders, fillers · CPC title

• Y02E60/50

  Fuel cells · CPC title

• H01M4/9008

  Organic or organo-metallic compounds · CPC title

• H01M4/9041

  Metals or alloys (H01M4/92 takes precedence) · CPC title

• H01M4/92

  Metals of platinum group (H01M4/94 {, H01M4/9058} take precedence) · CPC title