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Doped (Nd,Ba)FeO3 oxides as potential electrodes for symmetrically designed protonic ceramic electrochemical cells


The design of new electrode materials with high redox stability has great potential for the fabrication of solid oxide fuel and electrolysis cells having a symmetrical configuration; such a configuration is particularly promising in terms of economic and technological factors due to involving a reduced number of functional materials and technological steps. Under the framework of the present study, we developed new Nd1–xBaxFe0.9M0.1O3–δ materials (where M = Cu or Ni, x = 0.4 or 0.6), characterizing their functional properties (oxygen non-stoichiometry, thermomechanical and electrical properties) under both oxidizing and reducing conditions, as well as demonstrating the principal capability of their application as symmetrical electrodes in proton-conducting electrochemical cells. The obtained results demonstrate the desirability of a low barium content due to decreased thermal expansion coefficients and chemical strain contribution and Cu-doping due to the formation of an electrochemically active scaffold having nano-sized sediments. The Nd0.6Ba0.4Fe0.9Cu0.1O3–δ electrodes fabricated onto the BaCe0.5Zr0.3Y0.1Yb0.1O3–δ proton-conducting electrolytes exhibit polarization resistances of 1.1 and 15.1 Ω cm2 at 600 °C in wet air and wet hydrogen measuring atmospheres, respectively. These reported results are among the first concerning the effective operation of symmetrical electrodes in systems with proton-conducting electrolytes.

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    The Shared Access Center at the Institute of High Temperature Electrochemistry. http://www.ihte.uran.ru/?page_id=3146

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The characterization of materials was carried out at the Shared Access Centre ‘Composition of Compounds’ of the Institute of High Temperature Electrochemistry (Yekaterinburg, Russia [51]).


The major part of this work was performed according to the budgetary plans of the Institute of High Temperature Electrochemistry. Dr. D. Medvedev’ scientific activity was supported by the Council of the President of the Russian Federation (scholarship no. СП-161.2018.1).

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Correspondence to Dmitry A. Medvedev.

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Tarutina, L.R., Lyagaeva, J.G., Farlenkov, A.S. et al. Doped (Nd,Ba)FeO3 oxides as potential electrodes for symmetrically designed protonic ceramic electrochemical cells. J Solid State Electrochem (2020). https://doi.org/10.1007/s10008-020-04522-4

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  • Proton-conducting materials
  • Perovskite
  • SOFCs & SOECs
  • Symmetrical electrodes
  • BaCeO3
  • BaZrO3