Hostname: page-component-848d4c4894-pjpqr Total loading time: 0 Render date: 2024-06-26T19:59:26.285Z Has data issue: false hasContentIssue false
  • English
  • Français

Preparation and characterization of lead ruthenate based composite cathodes for SOFC applications

Published online by Cambridge University Press:  01 February 2011

Vincenzo Esposito ,
Enrico Traversa  and
Eric D. Wachsman
Vincenzo Esposito
Affiliation:
Department of Chemical Science and Technology, University of Rome Tor Vergata, Via della Ricerca Scientifica, 00133, Rome, Italy Department of Materials Science and Engineering, University of Florida, Gainesville, Florida 32611, U.S.A.
Enrico Traversa
Affiliation:
Department of Chemical Science and Technology, University of Rome Tor Vergata, Via della Ricerca Scientifica, 00133, Rome, Italy
Eric D. Wachsman
Affiliation:
Department of Materials Science and Engineering, University of Florida, Gainesville, Florida 32611, U.S.A.
Get access

Abstract

Nanometric pyrochlore lead ruthenate (Pb2Ru2O6.5) powders were prepared using a new chemical route as a possible candidate for cathode materials in solid oxide fuel cells (SOFCs). Pb2Ru2O6.5 was mixed with yttria-stabilized zirconia (YSZ) and erbia-stabilized bismuth oxide (ESB) to fabricate porous composite electrodes. Pure pyrochlore or composite electrodes were deposited as thick films onto YSZ and ESB electrolytes. Powders and films were analyzed using X-ray diffraction (XRD) analysis and field emission scanning electron microscopy (FE-SEM). Electrochemical features of the electrodes were investigated using electrochemical impedance spectroscopy (EIS) measurements at different temperatures in air for symmetric cells. The composite electrodes were compared to single Pb2Ru2O6.5 phase electrodes to evaluate the effect on polarization of the addition of the pure ionic conductor phase in the electrodes.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 835: Symposium K – Solid-State Ionics , 2004 , K8.10
Copyright
Copyright © Materials Research Society 2005

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

1. Arikawa, T., Murakami, Y., Takasu, Y., J. Appl. Electrochem., 28, 511 (1998)Google Scholar
2. Mehta, V., Cooper, J. S., J. Power Sources, 114, 32 (2003)Google Scholar
3. Kanno, R., Takeda, Y., Yamamoto, T., Kawamoto, Y., Yamamoto, O., J. Solid State Chem., 102, 106 (1993)Google Scholar
4. Lee, K. S., J. Solid State Chem., 131, 405 (1997)Google Scholar
5. Prakash, J., Tryk, D., Yeager, E.B., J. Electrochem. Soc., 146, 4145 (1999)Google Scholar
6. Shimizu, Y., Nishi, H., Suzuki, H., Maeda, K.. Sensors and Actuators B, 65, 141 (2000)Google Scholar
7. Prakash, J., Tryk, D., Aldred, W., Yeager, E., in: Murphy, O.J., Srinivasan, S., Conway, B.E. Eds., Electrochemistry in Transition Metals, Plenum Press, New York, (1992)Google Scholar
8. Burke, L.D., Murphy, O.J., J. Electroanal. Chem., 109, 199 (1980)Google Scholar
9. Ardizzone, A., Fregonara, G., Trasatti, S., Electrochim. Acta, 35, 263 (1990)Google Scholar
10. Prakash, J., Tryk, D., Yeager, E.B., J. Electrochem. Soc., 146, 4145 (1999)Google Scholar
11. Tuller, H., Solid State Ionics, 94, 63 (1997)Google Scholar
12. Adler, S. B., Solid State Ionics, 111, 125 (1998)Google Scholar
13. Fleig, J., “Electrical and Electrochemical Investigation of Inhomogeneities in Solid State Ionics”, Habilitationsschrift der Fakultät für Naturwissenschaften der Universität Ulm vorgelegt von Jürgen Fleig, Max-Planck-Institut für Festkörperforschung Stuttgart (2002)Google Scholar
14. Perry Murray, E., Barnett, S.A., Solid State Ionics, 143, 265 (2001)Google Scholar
15. Esposito, V., Traversa, E., Wachsman, E. D., Pb2Ru2O6.5 as a low temperature cathode for bismuth oxide electrolytes, 206th Meeting of the Electrochemical Society (ECS) proceedingsGoogle Scholar
16. Biefeld, R.M., White, S.S., J. Am. Ceramic Soc., 64 [3], 182 (1981)Google Scholar
17. Abram, E. J., Sinclair, D. C., West, A. R., J. Electroceram., 10, 165 (2003)Google Scholar
18. Colomer, M.T., Steele, B.C.H., Kilner, J.A., Solid State Ionics, 147, 41 (2002)Google Scholar