ANTIOXIDANT FOR POLYMER ELECTROLYTE MEMBRANE FUEL CELLS, ELECTROLYTE INCLUDING THE SAME, AND MEMBRANE-ELECTRODE ASSEMBLY FOR VEHICLES INCLUDING THE SAME

• US 20190319287A1
• Filed: 11/09/2018
• Published: 10/17/2019
• Est. Priority Date: 04/11/2018
• Status: Abandoned Application

• Current Assignee: Hyundai Motor Company (Hyundai Motor Group), Kia Motors Corporation (Kia Corp.)
• Original Assignee: Hyundai Motor Company (Hyundai Motor Group), Kia Motors Corporation (Kia Corp.)
• Inventors: Park, In Yu, Hong, Bo Ki, Ko, Jae Jun, Yu, Jung Han
• Application Number:
  US16/186,155
• Publication Number:
  US 20190319287A1
• Time in Patent Office: Days
• CPC Class Codes: C09K 15/02 containing inorganic compounds
• CPC Class Codes: H01M 2008/1095 Fuel cells with polymeric electrolytes
• CPC Class Codes: H01M 2250/20 Fuel cells in motive systems, e.g. vehicle, ship, plane
• CPC Class Codes: H01M 2300/0082 Organic polymers
• CPC Class Codes: H01M 8/1004 characterised by membrane-electrode assemblies [MEA] H01M8/12 takes precedence
• CPC Class Codes: H01M 8/1023 having only carbon, e.g. polyarylenes, polystyrenes or polybutadiene-styrenes
• CPC Class Codes: H01M 8/1051 Non-ion-conducting additives, e.g. stabilisers, SiO2 or ZrO2
• CPC Class Codes: Y02E 60/50 Fuel cells
• CPC Class Codes: Y02T 90/40 Application of hydrogen technology to transportation, e.g. using fuel cells

Abstract

Disclosed are an antioxidant for polymer electrolyte membrane fuel cells including barium cerium oxide and one or more rare-earth elements and having a Perovskite structure, an electrolyte membrane and the membrane-electrode assembly for vehicles including the antioxidant. The antioxidant for polymer electrolyte membrane fuel cells according to the present invention can improve antioxidant activity and long-term stability of electrolyte membranes and enhance durability of fuel cells.

Claims

1. An antioxidant for polymer electrolyte membrane fuel cells comprising barium cerium oxide and one or more rare-earth elements.

2. The antioxidant of claim 1, wherein the barium cerium oxide is complexed with the one or more rare-earth elements.

3. The antioxidant of claim 1, wherein the barium cerium oxide is doped with the one or more rare-earth elements.

4. The antioxidant of claim 1, wherein the barium cerium oxide doped with the rare-earth element has a Perovskite structure.

5. The antioxidant of claim 1, wherein the rare-earth element comprises at least one of yttrium (Y) or samarium (Sm).

6. The antioxidant of claim 3, wherein the barium cerium oxide doped with the one or more rare-earth elements is represented by the following Formula 1 or Formula 2:

BaCe_1-xY_xO_3-δ

(BCY) 

 

[Formula 1]

BaCe_1-xSm_xO_3-δ

(BCS), 

 

[Formula 2]

wherein X is a number greater than 0 and not greater than 0.5; and

δ

is a number greater than 0 and not greater than 0.25.

7. An electrolyte membrane for polymer electrolyte membrane fuel cells comprising:

an ionomer; and

an antioxidant having a Perovskite structure,

wherein the antioxidant comprises barium cerium oxide and one or more rare-earth elements.

8. The electrolyte membrane of claim 7, wherein the ionomer is a perfluorinated sulfonic acid ionomer, a hydrocarbon ionomer and a mixture thereof.

9. The electrolyte membrane of claim 7, wherein the one or more rare-earth elements comprise at least one of yttrium (Y) or samarium (Sm).

10. The electrolyte membrane of claim 7, wherein the barium cerium oxide is doped with the one or more rare-earth elements, which is represented by the following Formula 1 or Formula 2:

BaCe_1-xY_xO_3-δ

(BCY) 

 

[Formula 1]

BaCe_1-xSm_xO_3-δ

(BCS), 

 

[Formula 2]

wherein X is a number greater than 0 and not greater than 0.5; and

δ

is a number greater than 0 and not greater than 0.25.

11. The electrolyte membrane of claim 7, wherein the antioxidant is present in an amount of about 0.05 to 20% by weight, based on the weight of the electrolyte membrane.

14. The membrane-electrode assembly of claim 10, wherein the one or more rare-earth elements comprise at least one of yttrium (Y) or samarium (Sm).

15. The membrane-electrode assembly of claim 10, wherein the barium cerium oxide is doped with the one or more rare-earth elements, which is represented by the following Formula 1 or Formula 2:

BaCe_1-xY_xO_3-δ

(BCY) 

 

[Formula 1]

BaCe_1-xSm_xO_3-δ

(BCS), 

 

[Formula 2]

wherein X is a number greater than 0 and not greater than about 0.5; and

δ

is a number greater than 0 and not greater than about 0.25.

16. The membrane-electrode assembly of claim 10, wherein the antioxidant is present in an amount of about 0.05 to 20% by weight, based on the total weight of the electrolyte membrane.

17. A vehicle comprising a membrane-electrode assembly of claim 10.

12. A membrane-electrode assembly for vehicles comprising:

a cathode;

an electrolyte membrane disposed on the cathode and contacting the cathode; and

an anode disposed on the electrolyte membrane and contacting the electrolyte membrane,

wherein the electrolyte membrane comprises;

an ionomer; and

an antioxidant having a Perovskite structure,

wherein the antioxidant comprises barium cerium oxide and one or more rare-earth elements.

13. The membrane-electrode assembly of claim 12, wherein the ionomer is a perfluorinated sulfonic acid ionomer, a hydrocarbon ionomer and a mixture thereof.