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Synthesis and characterization of chromium spinels as potential electrode support materials for intermediate temperature solid oxide fuel cells

  • Hyceltec 2009
  • Published:
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Abstract

Several spinel compositions, i.e. Mn1+xCr2−xO4 (x = 0.7, 0.5, 0), MnFexCr2−xO4 (x = 0.1, 1), MgMnCrO4 and Mg1+xCr2−xO4 (x = 0, 0.1) were synthesised and studied in terms of phase analysis, density, stability in reducing atmosphere, electrical conductivity and thermal expansion behaviour. The spinel samples were single phase, with cell parameter values in a good correlation with cation sizes. Most of the studied spinels were found to be unstable under reducing conditions of thermal treatment, except MnCr2O4, MgCr2O4 and Mg1.1Cr1.9O4. Electrical properties have been investigated by impedance spectroscopy and DC conductivity measurements at temperatures between 200 and 900 °C.

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Acknowledgement

The authors would like to express their gratitude to the Office of Naval Research for financial support.

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Authors and Affiliations

  1. School of Chemistry, University of St. Andrews, St. Andrews, Fife, KY16 9ST, Scotland, UK

    E. Stefan & J. T. S. Irvine

Authors
  1. E. Stefan
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  2. J. T. S. Irvine
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Correspondence to E. Stefan.

Additional information

This paper follows from an oral presentation at Hyceltec 2009, the 2nd Iberian Symposium on Hydrogen, Fuel Cells and Advanced Batteries. Guest Editor: Verónica Cortés de Zea Bermudez.

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Stefan, E., Irvine, J.T.S. Synthesis and characterization of chromium spinels as potential electrode support materials for intermediate temperature solid oxide fuel cells. J Mater Sci 46, 7191–7197 (2011). https://doi.org/10.1007/s10853-010-4489-1

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  • DOI: https://doi.org/10.1007/s10853-010-4489-1

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