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Thermal characterization of Er-doped and Er–Gd co-doped ceria-based electrolyte materials for SOFC

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Abstract

Ce1−xErxO2 and Ce1−2xErxGdxO2 co-doped ceria electrolyte nanopowder materials were successfully prepared by sol–gel method. Depending on the temperature, the crystal structure changes were analyzed by X-ray diffraction. It was observed that the crystal size of the electrolytes decreased depending on the temperature and the time. X-ray diffraction results confirmed cubic fluorite structure in the samples. The microstructural properties of the samples were analyzed by scanning electron microscopy, and thermal stability measurement was performed by thermogravimetric and differential thermal analyses. The total electrical conductivity of the nanopowder electrolytes was determined by the dc four-point probe technique in air at temperatures ranging from room temperature to 1373 K. The four-probe conductivity results revealed that Ce0.8Er0.1Gd0.1O2 has a higher ionic conductivity compared to Ce0.83Er0.17O2 at 1123 K. The four-probe conductivity results show that both Ce1−xErxO2 and Ce1−2xErxGdxO2 solid electrolytes have potential application to oxide ionic conductor for solid oxide fuel cells.

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Acknowledgements

This study was supported by Scientific Research Projects Unit of Kahramanmaras Sutcu Imam University (Project Code: BAP-2013/7-18M), (KSU-Turkey) and Elbistan Technology Faculty.

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Authors and Affiliations

  1. Department of Energy System Engineering, Faculty of Technology, KahramanmaraşSütçü İmam University, 46340, Kahramanmaraş, Turkey

    Handan Ozlu Torun

  2. Science and Technology Research and Application Center (ARTMER), Bulent Ecevit University, 67100, Zonguldak, Turkey

    Soner Çakar

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Correspondence to Handan Ozlu Torun.

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Ozlu Torun, H., Çakar, S. Thermal characterization of Er-doped and Er–Gd co-doped ceria-based electrolyte materials for SOFC. J Therm Anal Calorim 133, 1233–1239 (2018). https://doi.org/10.1007/s10973-018-7189-8

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  • DOI: https://doi.org/10.1007/s10973-018-7189-8

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