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A New Electroactive and Stable Electrode Based on Praseodymium Molybdate for Symmetrical SOFCs

Russian Journal of Electrochemistry volume 58, pages 989–997 (2022)Cite this article

Abstract

The electrochemical activity of a new electrode material based on Pr5Mo3O16 + δ (РМО) within the composition of a symmetrical solid oxide fuel cell (S-SOFC) of the electrolyte-supported design is studied. The model S-SOFC of the РМО/Ce0.9Gd0.1O1.95(GDC)/Zr0.84Y0.16O1.92(YSZ)/GDC/PMO composition demonstrated the maximum power density of 28 mW/cm2 at 900°С. To improve the power characteristics of S-SOFC, the porous buffer GDC layer is modified by the method of Pr6O11 infiltration. It is found that the addition of electroactive Pr6O11 into the GDC buffer layer provides the three-fold increase in the fuel-cell power density with the maximum of 90 mW/cm2 at 900°С. The 10 h life-time test of the model S-SOFC with the РМО/GDC + Pr6O11/YSZ/GDC + Pr6O11/PMO composition carried out at a load of 0.7 V reveals the absence of any considerable degradation in fuel cell power characteristics. The results obtained suggest that the new electrode material based on PMO holds promise for the development of S-SOFC.

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ACKNOWLEDGMENTS

S.Ya. Istomin is grateful to the Interdisciplinary Scientific and Educational School of the Lomonosov Moscow State University: “The Future of the Planet and Global Environmental Changes” for supporting his investigations.

Funding

This study supported by the Russian Foundation for Basic Research (grant no. 20-08-00454). The materials used were synthesized within the framework of the State Task for the Institute of Problems of Chemical Physics (no. АААА-А19-119061890019-5).

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Authors and Affiliations

  1. Institute of Problems of Chemical Physics, Russian Academy of Sciences, Chernogolovka, Russia

    N. V. Lyskov

  2. Faculty of Chemistry, Lomonosov Moscow State University, Moscow, Russia

    A. I. Kotova, D. I. Petukhov, S. Ya. Istomin & G. N. Mazo

Authors
  1. N. V. Lyskov
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  2. A. I. Kotova
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  3. D. I. Petukhov
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  4. S. Ya. Istomin
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  5. G. N. Mazo
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Correspondence to N. V. Lyskov.

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Translated by T. Safonova

A tribute to outstanding electrochemist Oleg Aleksandrovich Petrii (1937–2021).

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Lyskov, N.V., Kotova, A.I., Petukhov, D.I. et al. A New Electroactive and Stable Electrode Based on Praseodymium Molybdate for Symmetrical SOFCs. Russ J Electrochem 58, 989–997 (2022). https://doi.org/10.1134/S102319352211009X

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  • DOI: https://doi.org/10.1134/S102319352211009X

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