Claims
- 1. A fuel electrode for high-temperature solid electrolyte fuel cells, the fuel electrode being a porous element produced by the process of coating ruthenium on an electrode material and sintering the same.
- 2. The fuel electrode of claim 1, wherein the ruthenium is a ruthenium metal powder having a particle size of 1-5 .mu.m, a ruthenium chloride, or a combination thereof; and further comprising a step of reducing the coating after the step of sintering.
- 3. A process for manufacturing a fuel electrode comprising dissolving or dispersing ruthenium powder or ruthenium chloride or a combination thereof in an organic solvent or water as a dissolving or dispersing agent, coating an electrode material with the resulting solution or dispersion, sintering the same and reducing it.
- 4. A process according to claim 3 wherein the dissolving or dispersing agent is water and the process further comprises adding a high molecular weight compound, which is soluble in water, to the dissolving or dispersing agent.
- 5. A process according to claim 4 wherein said high molecular weight compound is polyvinyl alcohol.
- 6. A process for manufacturing a fuel electrode comprising dissolving or dispersing ruthenium powder having a particle size of 1-5 .mu.m, or ruthenium chloride, or a combination thereof in an organic solvent or water as a dissolving or dispersing agent, coating an electrode material with the resulting solution or dispersion, sintering the same and reducing it.
- 7. A process according to claim 3 wherein said sintering is performed at 400 to 1,000.degree. C. followed by reduction at 500 to 1,300.degree. C.
- 8. A process according to claim 3 or 6, wherein said dissolving or dispersing agent is an organic solvent and said organic solvent is an alcohol of 1 to 6 carbon atoms.
- 9. A process according to claim 8, further comprising adding a high molecular weight compound, which is soluble in the alcohol, to the dissolving or dispersing agent.
Priority Claims (1)
Number |
Date |
Country |
Kind |
2-30224 |
Feb 1990 |
JPX |
|
Parent Case Info
This application is a continuation, of application Ser. No. 08/532,317, filed Sep. 20, 1995, now abandoned, which, in turn, is a continuation of application Ser. No. 08/340,963, filed Nov. 17, 1994, now abandoned, which, in turn, is a continuation of Ser. No. 08/195,420, filed Feb. 14, 1994, now abandoned, which, in turn, is a continuation of Ser. No. 07/650,138, filed Feb. 4, 1991, now U.S. Pat. No. 5,286,580.
US Referenced Citations (3)
Number |
Name |
Date |
Kind |
4190516 |
Kajimaya et al. |
Feb 1980 |
|
4478917 |
Fujita et al. |
Oct 1984 |
|
5286580 |
Ippommatsu et al. |
Feb 1994 |
|
Continuations (4)
|
Number |
Date |
Country |
Parent |
532317 |
Sep 1995 |
|
Parent |
340963 |
Nov 1994 |
|
Parent |
195420 |
Feb 1994 |
|
Parent |
650138 |
Feb 1991 |
|