Polymer electrolyte membrane and membrane-electrode assembly for polymer electrolyte fuel cell

Patent metadata

Field	Value
Publication number	US-9711817-B2
Application number	US-85482207-A
Country	US
Kind code	B2
Filing date	Sep 13, 2007
Priority date	Nov 22, 2006
Publication date	Jul 18, 2017
Grant date	Jul 18, 2017

Abstract

A polymer electrolyte membrane which comprises a polymer electrolyte having sulfonic acid groups, and contains any one of the following (a) to (c):
(a) cerium ions and an organic compound (X) capable of forming an inclusion compound with cerium ions; (b) an inclusion compound (Y) comprising the organic compound (X) including cerium ions; and (c) at least one of cerium ions and the organic compound (X), and the inclusion compound (Y).

First claim

What is claimed is:

1. A polymer electrolyte membrane which comprises a polymer electrolyte having sulfonic acid groups, and contains at least one of the following (a), (b), (c1), (c2) and (c3):
(a) cerium ions and an organic compound (X) capable of forming an inclusion compound with cerium ions,
wherein the organic compound (X) is a calixerene, crown ether or cyclodextrin,

(b) an inclusion compound (Y) comprising the organic compound (X) and cerium ions,
(c1) cerium ions and the inclusion compound (Y),
(c2) the organic compound (X) and the inclusion compound (Y), and
(c3) cerium ions, the organic compound (X) and the inclusion compound (Y).

2. The polymer electrolyte membrane according to claim 1 , wherein the organic compound (X) is a crown ether.

3. The polymer electrolyte membrane according to claim 2 , Wherein the crown ether is at least one crown ether selected from the group consisting of 15-crown-5, 18-crown-6 and an organic compound having such a structure in its molecule.

4. The polymer electrolyte membrane according to claim 1 , which contains cerium ions and the organic compound (X) (provided that the inclusion compound (Y) is regarded as a mixture of them) in a total amount of from 0.5 to 80 mass %.

5. The polymer electrolyte membrane according to claim 2 , which contains cerium ions and the organic compound (X) (provided that the inclusion compound (Y) is regarded as a mixture of them) in a total amount of from 0.5 to 80 mass %.

6. The polymer electrolyte membrane according to claim 3 , which contains cerium ions and the organic compound (X) (provided that the inclusion compound (Y) is regarded as a mixture of them) in a total amount of from 0.5 to 80 mass %.

7. The polymer electrolyte membrane according to claim 1 , which contains the organic compound (X) in a ratio of from 0.2 to 1.2 mole per mole of the cerium ions (provided that the inclusion compound (Y) is regarded as a mixture of them).

8. The polymer electrolyte membrane according to claim 2 , which contains the organic compound (X) in a ratio of from 0.2 to 1.2 mole per mole of the cerium ions (provided that the inclusion compound (Y) is regarded as a mixture of them).

9. The polymer electrolyte membrane according to claim 3 , which contains the organic compound (X) in a ratio of from 0.2 to 1.2 mole per mole of the cerium ions (provided that the inclusion compound (Y) is regarded as a mixture of them).

10. The polymer electrolyte membrane according to claim 4 , which contains the organic compound (X) in a ratio of from 0.2 to 1.2 mole per mole of the cerium ions (provided that the inclusion compound (Y) is regarded as a mixture of them).

11. The poly er electrolyte membrane according to claim 5 , which contains the organic compound (X) in a ratio of from 0.2 to 1.2 mole per mole of the cerium ions (provided that the inclusion compound (Y) is regarded as a mixture of them).

12. The polymer electrolyte membrane according to claim 6 , which contains the organic compound (X) in a ratio of from 0.2 to 1.2 mole per mole of the cerium ions (provided that the inclusion compound (Y) is regarded as a mixture of them).

13. The polymer electrolyte membrane according to claim 1 , wherein the polymer electrolyte is a sulfonic acid group-containing perfluorocarbon polymer.

14. The polymer electrolyte membrane according to claim 2 , wherein the polymer electrolyte is a sulfonic acid group-containing perfluorocarbon polymer.

15. The polymer electrolyte membrane according to claim 3 , wherein the polymer electrolyte is a sulfonic acid group-containing perfluorocarbon polymer.

16. The poly er electrolyte membrane according to claim 4 , wherein the polymer electrolyte is a sulfonic acid group-containing perfluorocarbon polymer.

17. The polymer electrolyte membrane according to claim 5 , wherein the polymer electrolyte is a sulfonic acid group-containing perfluorocarbon polymer.

18. The polymer electrolyte membrane according to claim 6 , wherein the polymer electrolyte is a sulfonic acid group-containing perfluorocarbon polymer.

19. The polymer electrolyte membrane according to claim 7 , wherein the polymer electrolyte is a sulfonic acid group-containing perfluorocarbon polymer.

20. The polymer electrolyte membrane according to claim 8 , wherein the polymer electrolyte is a sulfonic acid group-containing perfluorocarbon polymer.

21. The polymer electrolyte membrane according to claim 9 , wherein the polymer electrolyte is a sulfonic acid group-containing perfluorocarbon polymer.

22. The polymer electrolyte membrane according to claim 10 , wherein the polymer electrolyte is a sulfonic acid group-containing perfluorocarbon polymer.

23. The polymer electrolyte membrane according to claim 11 , wherein the polymer electrolyte is a sulfonic acid group-containing perfluorocarbon polymer.

24. A membrane-electrode assembly for a fuel cell, which comprises a layer of a polymer electrolyte membrane Which comprises a polymer electrolyte having sulfonic acid groups and contains at least one of the following (a), (b), (c1), (c2) and (c3), and a catalyst layer containing a catalyst, an electrically conductive material and an ion exchange resin, provided on both sides of the polymer electrolyte membrane:
(a) cerium ions and an organic compound (X) capable of forming an inclusion compound with cerium ions,
wherein the organic compound (X) is a calixerene, crown ether or cyclodextrin,

(b) an inclusion compound comprising the organic compound (X) and cerium ions,
(c1) cerium ions and the inclusion compound (Y),
(c2) the organic compound (X) and the inclusion compound (Y), and
(c3) cerium ions, the organic compound (X) and the inclusion compound (Y).

25. The membrane-electrode assembly for a fuel cell according to claim 24 , wherein the organic compound (X) is a crown ether.

26. The membrane-electrode assembly for a fuel cell according to claim 25 , wherein the crown ether is at least one crown ether selected from the group consisting of 15-crown-5, 18-crown-6 and an organic compound having such a structure in its molecule.

27. The membrane-electrode assembly for a fuel cell according to claim 24 , which further has a gas diffusion layer outside the both catalyst layers.

28. The membrane-electrode assembly for a fuel cell according to claim 25 , which further has a gas diffusion layer outside the both catalyst layers.

29. The membrane-electrode assembly for a fuel cell according to claim 26 , which further has a gas diffusion layer outside the both catalyst layers.

30. The polymer electrolyte membrane according to claim 1 , which comprises (a).

31. The polymer electrolyte membrane according to claim 1 , which comprises (b).

32. The polymer electrolyte membrane according to claim 1 , which comprises (c1).

33. The polymer electrolyte membrane according to claim 1 , which comprises (c2).

34. The polymer electrolyte membrane according to claim 1 , which comprises (c3).

35. The membrane-electrode assembly for a fuel cell according to claim 24 , wherein the polymer electrolyte membrane comprises (a).

36. The membrane-electrode assembly for a fuel cell according to claim 24 , wherein the polymer electrolyte membrane comprises (b).

37. The me

Assignees

• Endoh Eiji
• Doi Yoshitaka
• Asahi Glass Co Ltd

Inventors

• Endoh Eiji
• Doi Yoshitaka

Classifications

• H01M4/881

  Electrolytic membranes · CPC title

• H01M8/1039 Primary

  halogenated, e.g. sulfonated polyvinylidene fluorides · CPC title

• H01M2300/0082

  Organic polymers · CPC title

• H01M8/1025

  having only carbon and oxygen, e.g. polyethers, sulfonated polyetheretherketones [S-PEEK], sulfonated polysaccharides, sulfonated celluloses or sulfonated polyesters · CPC title

• H01M8/1046

  Mixtures of at least one polymer and at least one additive · CPC title