Tube-shaped catalyst complex and catalyst slurry including same for fuel cell

Patent metadata

Field	Value
Publication number	US-12100846-B2
Application number	US-202217834931-A
Country	US
Kind code	B2
Filing date	Jun 8, 2022
Priority date	Jun 8, 2021
Publication date	Sep 24, 2024
Grant date	Sep 24, 2024

Abstract

The present disclosure relates to a tube-shaped catalyst complex and a catalyst slurry including the same for a fuel cell. The catalyst complex for a fuel cell comprises a tubular inner layer including an ionomer and an outer layer provided on an outer surface of the inner layer and including a catalyst.

First claim

What is claimed is:

1. A catalyst complex for a fuel cell, the catalyst complex comprising:
a tubular inner layer in the form of a void tube including an ionomer; and
an outer layer provided on an outer surface of the inner layer and including a catalyst.

2. The catalyst complex of claim 1 , wherein the inner layer has an inner diameter of 1 nm to 100 nm.

3. The catalyst complex of claim 1 , wherein the inner layer has a length of 20 nm to 200 nm.

4. The catalyst complex of claim 1 , wherein the ionomer includes at least one selected from the group consisting of polysulfones, polyetherketones, polyethers, polyesters, polybenzimidazoles, and combinations thereof.

5. The catalyst complex of claim 1 , wherein the outer layer covers 90% or more of the entire outer surface area of the inner layer.

6. The catalyst complex of claim 1 , wherein the catalyst includes at least one selected from the group consisting of platinum, palladium, rhodium, iridium, ruthenium, and a combination thereof.

7. A catalyst slurry for a fuel cell, the catalyst slurry comprising a catalyst complex, an ion-transport material, and a solvent,
wherein the catalyst comprises:
a tubular inner layer in the form of a void tube including an ionomer; and
an outer layer provided on an outer surface of the inner layer and including a catalyst.

8. The catalyst slurry of claim 7 , wherein the catalyst slurry contains 20 parts to 80 parts by weight of the ion-transport material relative to 100 parts by weight of the catalyst complex.

9. The catalyst slurry of claim 7 , the solvent includes at least one selected from the group consisting of distilled water, ethanol, propanol, butanol, ethylene glycol, and a combination thereof.

10. The catalyst slurry of claim 7 , further comprising at least one carbon material selected from the group consisting of carbon black, carbon nanotube, carbon nanofiber, and any combination thereof.

11. The catalyst slurry of claim 10 , wherein the catalyst slurry contains 30 parts to 200 parts by weight of the carbon material relative to 100 parts by weight of the catalyst complex.

12. An electrode for a fuel cell, the electrode comprising a catalyst complex and an ion-transport material,
wherein the catalyst comprises:
a tubular inner layer in the form of a void tube including an ionomer; and
an outer layer provided on an outer surface of the inner layer and including a catalyst.

13. The electrode of claim 12 , wherein the electrode contains 20 parts to 80 parts by weight of the ion-transport material relative to 100 parts by weight of the catalyst complex.

14. The electrode of claim 12 , wherein the electrode is 1 μm to 15 μm thick.

15. A method of manufacturing a catalyst complex for a fuel cell, the method comprising:
preparing a rod-shaped structural element containing a transition metal;
forming an inner layer including an ionomer on an outer surface of the structural element;
forming an outer layer including a catalyst on an outer surface of the inner layer; and
treating the resulting structure with an acidic solution to remove the structural element.

16. The method of claim 15 , wherein the transition metal includes at least one selected from the group consisting of nickel, cobalt, iron, and any combination thereof.

17. The method of claim 15 , wherein the structural element has a diameter of 1 nm to 100 nm and a length of 20 nm to 200 nm.

18. The method of claim 15 , wherein the ionomer includes at least one selected from the group consisting of polysulfones, polyetherketones, polyethers, polyesters, polybenzimidazoles, and combinations thereof.

19. The method of claim 15 , wherein the catalyst includes at least one selected from the group consisting of platinum, palladium, rhodium, iridium, ruthenium, and a combination thereof.

20. The method of claim 15 , wherein the structural element is removed by treating the resulting structure with the acidic solution including at least one acid selected from the group consisting of sulfuric acid, nitric acid, acetic acid, formic acid, and any combination thereof.

Assignees

• Hyundai Motor Co Ltd
• Kia Corp

Inventors

• Cho Yoon Hwan
• Seol Su Won
• Ji Byeong Gab

Classifications

• B01J21/185

  Carbon nanotubes (carbon nanotubes per se C01B32/15) · CPC title

• B01J21/18

  Carbon · CPC title

• B01J23/40

  of the platinum group metals · CPC title

• H01M4/9083

  on carbon or graphite · CPC title

• H01M4/8892

  Impregnation or coating of the catalyst layer, e.g. by an ionomer · CPC title