Carbon support for fuel cell catalyst and method of manufacturing the same

Patent metadata

Field	Value
Publication number	US-12206116-B2
Application number	US-202117217987-A
Country	US
Kind code	B2
Filing date	Mar 30, 2021
Priority date	Dec 9, 2020
Publication date	Jan 21, 2025
Grant date	Jan 21, 2025

Abstract

Disclosed are a method of manufacturing a carbon support for a fuel cell catalyst, a carbon support for a fuel cell catalyst manufactured according to the method, and a catalyst for a fuel cell including the same. The method may include using various organic materials containing N and various carbon supports and thus provide excellent economic feasibility. In addition, pyridinic N and pyrrolic N of doped N can be adjusted at an optimal content ratio so that the carbon support for a fuel cell catalyst manufactured and the catalyst for a fuel cell including the same have excellent electrochemical resistance and excellent electrochemical characteristic due to an increase in an electrochemically active surface area, and excellent durability due to an increase in thermal durability.

First claim

What is claimed is:

1. A method of manufacturing of a carbon support for a fuel cell catalyst, comprising:
pretreating a conductive carbon support with an acid solution;
preparing an admixture comprising 1) the pretreated conductive carbon support and 2) an organic material containing nitrogen (N); and
heat-treating the admixture,
wherein the heat-treating is performed at a temperature ranging from 750° C. to 850° C.,
wherein, in the pretreating, the pretreatment is performed at a temperature ranging from 130° C. to 150° C. for one to two hours,
wherein an interior of the carbon support is doped with nitrogen (N), and the N is present in a form of pyridinic N, pyrrolic N and graphitic N,
wherein amount of the pyridinic N or the pyrrolic N is greater than the graphitic N,
and
wherein a content ratio of the pyridinic N/the pyrrolic N ranges from 0.50 to 1.30.

2. The method of claim 1 , wherein, in the pretreating, a weight ratio of the conductive carbon support to the acid solution is 1:40 to 50.

3. The method of claim 1 , wherein the conductive carbon support comprises one or more selected from the group consisting of carbon black, acetylene black, carbon nanotubes, black lead, graphene, graphite nanofibers, fullerene, ketjen black, graphite, and ordered mesoporous carbon.

4. The method of claim 1 , wherein an acid contained in the acid solution comprises one or more selected from the group consisting of nitric acid, hydrochloric acid, sulfuric acid, and perchloric acid.

5. The method of claim 1 , wherein, in the preparing the admixture, a weight ratio of the pretreated conductive carbon support to the organic material containing N is 1:5 to 10.

6. The method of claim 1 , wherein the organic material containing N comprises one or more selected from the group consisting of melamine, urea, ammonia (NH 3 ), and cyanide (CN).

7. The method of claim 1 , further comprising:
after the heat-treating of the admixture, washing and drying the heat-treated admixture.

8. The method of claim 7 , wherein the washing is performed with a mixed solution of water and ethanol at a temperature ranging from 50° C. to 70° C.

9. The method of claim 7 , wherein the drying is performed at a temperature ranging from 80° C. to 85° C. for ten to fourteen hours.

10. A method of manufacturing of a carbon support for a fuel cell catalyst, comprising:
pretreating a conductive carbon support with an acid solution;
preparing an admixture by physically mixing 1) the pretreated conductive carbon support and 2) a solid phase organic material containing nitrogen (N); and
heat-treating the admixture,
wherein, in the preparing the admixture, a weight ratio of the pretreated conductive carbon support to the organic material containing N is 1:5 to 10,
wherein, in the pretreating, the pretreatment is performed at a temperature ranging from 130° C. to 150° C. for one to two hours,
wherein an interior of the carbon support is doped with nitrogen (N), and the N is present in a form of pyridinic N, pyrrolic N and graphitic N,
wherein amount of the pyridinic N or the pyrrolic N is greater than the graphitic N,
and
wherein a content ratio of the pyridinic N/the pyrrolic N ranges from 0.50 to 1.30.

Assignees

• Hyundai Motor Co Ltd
• Kia Motors Corp
• Korea Advanced Inst Sci & Tech

Inventors

• Yang Ji Hoon
• Choi Jin Seong
• Han Kook Il
• Cho Geon Hee
• Lee Jin Woo
• Lee Ah Ryeon

Classifications

• Y02E60/50

  Fuel cells · CPC title

• H01M4/9083

  on carbon or graphite · CPC title

• H01M4/921

  Alloys or mixtures with metallic elements · CPC title

• C01B32/372

  Coating; Grafting; Microencapsulation · CPC title

• H01M4/926 Primary

  on carbon or graphite · CPC title