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Implications of Cation Interdiffusion between Double Perovskite Cathode and Proton-Conducting Electrolyte for Performance of Solid Oxide Fuel Cells

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  • Nadezhda S. Tsvetkova

    (Institute of Natural Sciences and Mathematics, Ural Federal University, 19 Mira St., 620002 Ekaterinburg, Russia)

  • Dmitry A. Malyshkin

    (Laboratory of Hydrogen Energy, Ural Federal University, 19 Mira St., 620002 Ekaterinburg, Russia)

  • Ivan L. Ivanov

    (Laboratory of Hydrogen Energy, Ural Federal University, 19 Mira St., 620002 Ekaterinburg, Russia)

  • Dmitry S. Tsvetkov

    (Institute of Natural Sciences and Mathematics, Ural Federal University, 19 Mira St., 620002 Ekaterinburg, Russia
    Laboratory of Hydrogen Energy, Ural Federal University, 19 Mira St., 620002 Ekaterinburg, Russia)

  • Andrey Yu. Zuev

    (Institute of Natural Sciences and Mathematics, Ural Federal University, 19 Mira St., 620002 Ekaterinburg, Russia)

Abstract

Chemical compatibility and cation interdiffusion between the double perovskite cobaltites R BaCo 2 O 6−δ ( R = Gd, Pr) and proton-conducting electrolyte BaZr 0.8 Y 0.2 O 3−δ were studied. Chemical interaction was found to occur already at 1100 °C as a result of the partial dissolution of R BaCo 2 O 6−δ ( R = Gd, Pr) in BaZr 0.8 Y 0.2 O 3−δ . Analysis of the element distribution along the cross sections of diffusion couples R BaCo 2 O 6−δ ( R = Gd, Pr)|BaZr 0.8 Y 0.2 O 3−δ showed strong interdiffusion of cations, with cobalt being the most mobile one. Its diffusion depth in the electrolyte reaches up to several hundreds of micrometers. The addition of NiO as a sintering aid to BaZr 0.8 Y 0.2 O 3−δ promotes cation diffusion especially through the grain boundary mechanism, increasing the diffusion depth of Co. The possible implications of cation interdiffusion on the performance of proton-conducting SOFCs are discussed based on the results obtained.

Suggested Citation

  • Nadezhda S. Tsvetkova & Dmitry A. Malyshkin & Ivan L. Ivanov & Dmitry S. Tsvetkov & Andrey Yu. Zuev, 2023. "Implications of Cation Interdiffusion between Double Perovskite Cathode and Proton-Conducting Electrolyte for Performance of Solid Oxide Fuel Cells," Energies, MDPI, vol. 16(7), pages 1-12, March.
    • Handle: RePEc:gam:jeners:v:16:y:2023:i:7:p:2980-:d:1106667
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    References listed on IDEAS

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    1. Vinoth Kumar, R. & Khandale, A.P., 2022. "A review on recent progress and selection of cobalt-based cathode materials for low temperature-solid oxide fuel cells," Renewable and Sustainable Energy Reviews, Elsevier, vol. 156(C).
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