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


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.


  1. 1.

    T. Arikawa, Y. Murakami, Y. Takasu, J. Appl. Electrochem., 28, 511 (1998)

    Article  CAS  Google Scholar 

  2. 2.

    V. Mehta, J. S. Cooper, J. Power Sources, 114, 32 (2003)

    Article  CAS  Google Scholar 

  3. 3.

    R. Kanno, Y. Takeda, T. Yamamoto, Y. Kawamoto, O. Yamamoto, J. Solid State Chem., 102, 106 (1993)

    Article  CAS  Google Scholar 

  4. 4.

    K. S. Lee, J. Solid State Chem., 131, 405 (1997)

    Article  CAS  Google Scholar 

  5. 5.

    J. Prakash, D. Tryk, E.B. Yeager, J. Electrochem. Soc., 146, 4145 (1999)

    Article  CAS  Google Scholar 

  6. 6.

    Y. Shimizu, H. Nishi, H. Suzuki, K. Maeda. Sensors and Actuators B, 65, 141 (2000)

    Article  CAS  Google Scholar 

  7. 7.

    J. Prakash, D. Tryk, W. Aldred, E. Yeager, in: O.J. Murphy, S. Srinivasan, B.E. Conway Eds., Electrochemistry in Transition Metals, Plenum Press, New York, (1992)

  8. 8.

    L.D. Burke, O.J. Murphy, J. Electroanal. Chem., 109, 199 (1980)

    Article  CAS  Google Scholar 

  9. 9.

    A. Ardizzone, G. Fregonara, S. Trasatti, Electrochim. Acta, 35, 263 (1990)

    Article  CAS  Google Scholar 

  10. 10.

    J. Prakash, D. Tryk, E.B. Yeager, J. Electrochem. Soc., 146, 4145 (1999)

    Article  CAS  Google Scholar 

  11. 11.

    H. Tuller, Solid State Ionics, 94, 63 (1997)

    Article  CAS  Google Scholar 

  12. 12.

    S. B. Adler, Solid State Ionics, 111, 125 (1998)

    Article  CAS  Google Scholar 

  13. 13.

    J. Fleig, “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)

  14. 14.

    E. Perry Murray, S.A. Barnett, Solid State Ionics, 143, 265 (2001)

    Article  CAS  Google Scholar 

  15. 15.

    V. Esposito, E. Traversa, E. D. Wachsman, Pb2Ru2O6.5 as a low temperature cathode for bismuth oxide electrolytes, 206th Meeting of the Electrochemical Society (ECS) proceedings

  16. 16.

    R.M. Biefeld, S.S. White, J. Am. Ceramic Soc., 64[3], 182 (1981)

    Article  CAS  Google Scholar 

  17. 17.

    E. J. Abram, D. C. Sinclair, A. R. West, J. Electroceram., 10, 165 (2003)

    Article  CAS  Google Scholar 

  18. 18.

    M.T. Colomer, B.C.H. Steele, J.A. Kilner, Solid State Ionics, 147, 41 (2002)

    Article  CAS  Google Scholar 

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One of the authors (VE) is a joint PhD student between University of Florida and Università di Roma “Tor Vergata”, and would like to acknowledge the Ministry of Education, University and Research (MIUR) of Italy for supporting his scholarship under the frame of the Internationalization Project. This work was supported in part by MIUR (FISR Project), by US Department of Energy contract DE-FC26-03NT41959, and by the Ministry of Foreign Affairs (MAE) of Italy under the frame of the Italy-USA Joint Laboratory on “Nanostructured Materials for Solid State Ionic-Devices”.

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Esposito, V., Traversa, E. & Wachsman, E.D. Preparation and characterization of lead ruthenate based composite cathodes for SOFC applications. MRS Online Proceedings Library 835, K8.10 (2004).

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