Fuel cell catalyst, fuel cell electrode including the same and membrane-electrode assembly including the same

Patent metadata

Field	Value
Publication number	US-11462745-B2
Application number	US-202017114920-A
Country	US
Kind code	B2
Filing date	Dec 8, 2020
Priority date	Dec 10, 2019
Publication date	Oct 4, 2022
Grant date	Oct 4, 2022

Abstract

The present disclosure relates to a fuel cell catalyst, a fuel cell electrode including the same, and a membrane-electrode assembly including the same. In one embodiment, the fuel cell catalyst includes: a support including a titanium oxynitride represented by the following Formula 1: TiO1-yNy, wherein 0.05<y<0.9; and an active material supported on the support.

First claim

What is claimed is:

1. A fuel cell catalyst comprising:
a support comprising a titanium oxynitride represented by the following Formula 1; and
an active material supported on the support:
TiO1-yNy   [Formula 1]

wherein 0.05<y<0.9,
wherein the titanium oxynitride of Formula 1 is comprised in an amount of 2.4 to 20 wt % based on the total weight of the support.

2. The fuel cell catalyst of claim 1 , wherein the titanium oxynitride of Formula 1 is comprised in an amount of 2.5 to 19 wt % based on the total weight of the support.

3. The fuel cell catalyst of claim 1 , comprising 100 parts by weight of the support and 10 to 60 parts by weight of the active material.

4. The fuel cell catalyst of claim 1 , wherein the active material has an average size of 2 to 10 nm.

5. The fuel cell catalyst of claim 1 , wherein the support has a BET specific surface area of 20 to 50 m2/g and an electrical conductivity of 20 to 40 S/cm.

6. The fuel cell catalyst of claim 1 , wherein the support has an average pore size of 50 to 80 nm.

7. The fuel cell catalyst of claim 1 , wherein the support is prepared by a method comprising steps of:
preparing an intermediate by heat-treating titanium dioxide (TiO2) to a temperature of 400 to 900° C. while introducing a nitrogen-containing gas thereto; and
cooling the intermediate.

8. The fuel cell catalyst of claim 7 , wherein the heat- treating is performed by heating to a temperature of 400 to 900° C. at a heating rate of 1 to 15° C/second.

9. The fuel cell catalyst of claim 1 , wherein the active material includes one or more precious metals selected from among platinum (Pt), palladium (Pd), iridium (Ir) and ruthenium (Ru).

10. The fuel cell catalyst of claim 9 , wherein the active material further comprises one or more transition metals selected from among copper (Cu), cobalt (Co), nickel (Ni) and iron (Fe).

11. A fuel cell electrode comprising the fuel cell catalyst of claim 1 .

12. A membrane-electrode assembly comprising: a cathode; an anode; and an electrolyte membrane interposed between the cathode and the anode,
wherein one or more of the cathode and the anode comprise the fuel cell catalyst of claim 1 .

13. A fuel cell comprising the fuel cell catalyst of claim 1 .

Assignees

• Hyundai Mobis Co Ltd

Inventors

• You Dae Jong
• Lim Yong Ho
• You Eun Young

Classifications

• H01M4/925 Primary

  supported on carriers, e.g. powder carriers · CPC title

• H01M4/8652

  as mixture · CPC title

• H01M4/926

  on carbon or graphite · CPC title

• H01M4/9075 Primary

  Catalytic material supported on carriers, e.g. powder carriers (H01M4/8807, H01M4/881, H01M4/8814, H01M4/925 take precedence) · CPC title

• H01M4/921

  Alloys or mixtures with metallic elements · CPC title