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Characterization, Electrical and Electrochemical Study of La0.9Sr1.1Co1−xMoxO4 (x ≤ 0.1) as Cathode for Solid Oxide Fuel Cells

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Abstract

In this study, Ruddlesden–Popper La0.9Sr1.1Co1−xMoxO4 (x ≤ 0.1) powders were successfully synthesized using a modified sol–gel method. The structural analysis revealed that all samples had a tetragonal phase at room temperature. The electrical conductivity measurements showed that all samples had semiconducting behavior in the range of room temperature to 850°C. Moreover, it was found that the electrical conductivity of the ceramics was enhanced with the increase of Mo doping, at temperatures higher than 300°C up to 850°C. This enhancement of the electrical conductivity can be due to Co3+–O–Mo5+–O–Co2+ double-exchange interaction. The EIS measurements of the symmetrical cells were carried out for x = 0, 0.03 and 0.1 samples at 650°C, 750°C and 850°C. The obtained area specific resistance (ASR) values of La0.9Sr1.1Co1−xMoxO4 on ceria-gadolinium oxide (CGO) electrolyte at 850°C were 0.36 Ω cm2, 0.35 Ω cm2 and 1 Ω cm2 for samples x = 0, 0.03 and 0.1, respectively. These results indicate that the electrical conductivity of pure sample (La0.9Sr1.1CoO4) has been enhanced by Mo substitution in Co ion sites, but limits the oxygen ion transport.

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Acknowledgments

This work has been financially supported by the Vice President for Research and Technology, Ferdowsi University of Mashhad, Iran, under Grant No. 3-40687.

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Authors and Affiliations

  1. Materials and Electroceramics Lab, Department of Physics, Ferdowsi University of Mashhad, Mashhad, Iran

    T. Ghorbani-Moghadam & A. Kompany

  2. Nano Research Center, Ferdowsi University of Mashhad, Mashhad, Iran

    A. Kompany & M. Ebrahimizadeh Abrishami

  3. School of Physics, Damghan University, Damghan, Iran

    M. M. Bagheri-Mohagheghi

  4. Renewable Energy Department, Niroo Research Institute, Shahrak Gharb, Tehran, Iran

    M. Golmohammad

Authors
  1. T. Ghorbani-Moghadam
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  2. A. Kompany
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  3. M. M. Bagheri-Mohagheghi
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  4. M. Ebrahimizadeh Abrishami
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  5. M. Golmohammad
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Correspondence to A. Kompany.

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Ghorbani-Moghadam, T., Kompany, A., Bagheri-Mohagheghi, M.M. et al. Characterization, Electrical and Electrochemical Study of La0.9Sr1.1Co1−xMoxO4 (x ≤ 0.1) as Cathode for Solid Oxide Fuel Cells. J. Electron. Mater. 49, 6448–6454 (2020). https://doi.org/10.1007/s11664-020-08404-3

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  • DOI: https://doi.org/10.1007/s11664-020-08404-3

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