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Thermal and Electrical properties of Ce0.8−x Gd x Sm0.2O2−δ materials for SOFC applications

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Abstract

Gadolinium and samarium co-doped ceria electrolyte materials Ce0.8−x Gd x Sm0.2O2−δ (x = 0, 0.02, 0.04, 0.06) were prepared by using sol–gel method. The prepared materials were characterized by X-ray diffraction and scanning electron microscopy. The phase identification and the cell parameters were determined by X-ray powder diffraction. Thermal expansion of prepared materials was measured using dilatometric method in the temperature range 30–1000 °C. The thermal expansion increases linearly increasing temperature. The electrical conductivity was measured using impedance spectroscopy. Among the prepared compositions, Ce0.74Gd0.06Sm0.2O2−δ showed higher electrical conductivity and lower activation energy at 450 °C. Which makes suitable as an electrolyte and it may be a promising candidate for as an electrolyte in IT-SOFCs.

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Authors and Affiliations

  1. Department of Physics, Nizam College, Osmania University, Hyderabad, India

    V. Venkatesh

  2. Department of Physics, University College of Science, Osmania University, Hyderabad, India

    P. Kistaiah & C. Vishnuvardhan Reddy

  3. Department of H&S, M.J College of Engineering and Technology, Hyderabad, India

    V. Prashanth Kumar

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  1. V. Venkatesh
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  2. V. Prashanth Kumar
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  4. C. Vishnuvardhan Reddy
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Correspondence to V. Venkatesh.

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Venkatesh, V., Prashanth Kumar, V., Kistaiah, P. et al. Thermal and Electrical properties of Ce0.8−x Gd x Sm0.2O2−δ materials for SOFC applications. Ionics 21, 1997–2004 (2015). https://doi.org/10.1007/s11581-015-1383-5

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  • DOI: https://doi.org/10.1007/s11581-015-1383-5

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