Carbon support for fuel cell catalyst and preparation method thereof

Patent metadata

Field	Value
Publication number	US-10483554-B2
Application number	US-201514979877-A
Country	US
Kind code	B2
Filing date	Dec 28, 2015
Priority date	Jul 1, 2015
Publication date	Nov 19, 2019
Grant date	Nov 19, 2019

Abstract

Disclosed is a carbon support for a fuel cell catalyst that supports a metal. The carbon support includes a conductive carbon support and nitrogen atoms doped into the conductive carbon support. Also disclosed is a method for preparing the carbon support. Also disclosed is a catalyst including the carbon support. The catalyst has greatly improved degradation resistance compared to conventional catalysts for fuel cells. In addition, the catalyst is not substantially degraded even when applied to a single cell.

First claim

What is claimed is:

1. A method for preparing a nitrogen-doped carbon support for a fuel cell catalyst, the method comprising:
(A) mixing a conductive carbon support with a nitrogen-containing organic material;
(B) primarily annealing the mixture at 90 to 150° C. for 2 to 10 hours in a normal air atmosphere so as to react nitrogen atoms of the nitrogen-containing material with the support; and
(C) secondarily annealing the primarily annealed mixture at 600 to 750° C. under a nitrogen atmosphere
so as to completely dope the nitrogen atoms into the support.

2. The method according to claim 1 , wherein in step (A), the conductive carbon support is mixed with the nitrogen-containing organic material in a weight ratio of 1:1-2.

3. The method according to claim 1 , wherein in step (A), the conductive carbon support and the nitrogen-containing organic material are dissolved in at least one solvent selected from the group consisting of distilled water and methanol, ethanol, and ethylene glycol as organic solvents.

4. The method according to claim 1 , wherein in step (A), the conductive carbon support is selected from the group consisting of carbon black, acetylene black, graphite, graphene, fullerenes, and combinations thereof.

5. The method according to claim 4 , wherein the fullerenes are in the form of carbon nanotubes (CNTs).

6. The method according to claim 4 , wherein the graphite is in the form of graphite nanofibers (GNFs).

7. The method according to claim 1 , wherein in step (A), the nitrogen-containing organic material is selected from the group consisting of dicyandiamide, pyrrole, aniline, phthalocyanine, porphyrin, acetonitrile, cyanamide, acrylonitrile, polypyrrole, polyaniline, polyacrylonitrile, melamine, and mixtures thereof.

8. The method according to claim 1 , wherein the primary annealing is performed for 3 to 5 hours.

9. The method according to claim 1 , wherein the primary annealing is performed at 100 to 120° C.

10. The method according to claim 1 , wherein the reaction forms a carbonitride.

11. The method according to claim 1 , wherein the secondary annealing is performed at 550 to 700° C.

12. The method according to claim 1 , wherein the amount of the nitrogen atoms doped into the conductive carbon support is from 5 to 50 parts by volume, based on 100 parts by volume of the conductive carbon support.

Assignees

• Korea Inst Sci & Tech

Inventors

• Kim Jin Young
• Yoo Sung Jong
• Henkensmeier Dirk
• Jang Jong Hyun
• Kim Hyoung-Juhn
• Jeong Yeon Hun
• Kim Nayoung
• Yoon Chang Won
• Han Jonghee
• Nam Suk Woo
• Lim Tae Hoon

Classifications

• H01M4/9083

  on carbon or graphite · CPC title

• H01M4/8817 Primary

  Treatment of supports before application of the catalytic active composition (coated porous composites H01M8/0245) · CPC title

• H01M4/926 Primary

  on carbon or graphite · CPC title

• B01J27/24

  Nitrogen compounds · CPC title

• C01B2203/1082

  Composition of support materials · CPC title