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Electrochemical Oxygen Generator with Solid-Molten Bi2O3–B2O3 Electrolyte and Porous Bi3Ru3O11–Bi2O3 Electrodes

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Abstract

A symmetrical electrochemical cell Bi3Ru3O11−35 wt % Bi2O3 porous electrode|Bi2O3−0.2 wt % B2O3 solid-molten electrolyte|Bi3Ru3O11−35 wt % Bi2O3 porous electrode is developed. The values of the cell ohmic and polarization resistances, Faraday efficiency, and oxygen permeation flux of the cell were measured using impedance spectroscopy and Coulomb volumetric technique at 740°C. These values are 0.046 and 0.077 Ω cm2, 97%, and 5×10–7 mol cm–2 s–1, respectively. The effect of wetting of the porous electrode surface on the polarization resistance was analyzed. The Bi3Ru3O11−35 wt % Bi2O3 and solid-molten Bi2O3−0.2 wt % B2O3 composites have a great potential to be used as the electrode and electrolyte materials in electrochemical oxygen generators.

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Funding

This work is carried out in frames of the Baykov Institute of Metallurgy and Materials Science State contract no. 075-00715-22-00. The scanning electron microscopy measurements were carried out by V.V. Artemov in frames of the Federal Research Center of Crystallography and Photonics State contract, with the using of equipment from its core facilities center, supported by the Ministry of Sciences and Higher Education of the Russian Federation.

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Authors and Affiliations

  1. Baykov Institute of Metallurgy and Materials Science, Russian Academy of Sciences, Moscow, Russia

    P. E. Dergacheva, S. V. Fedorov, V. V. Belousov & A. A. Konovalov

  2. Federal Research Center of Crystallography and Photonics, Russian Academy of Sciences, Moscow, Russia

    V. V. Artemov

Authors
  1. P. E. Dergacheva
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  2. S. V. Fedorov
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  3. V. V. Belousov
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  4. A. A. Konovalov
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  5. V. V. Artemov
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Correspondence to P. E. Dergacheva.

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Translated by Yu. Pleskov

Based on the materials of the 16th International Meeting “Fundamental Problems of Solid State Ionics,” Chernogolovka, June 27–July 7, 2022.

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Dergacheva, P.E., Fedorov, S.V., Belousov, V.V. et al. Electrochemical Oxygen Generator with Solid-Molten Bi2O3–B2O3 Electrolyte and Porous Bi3Ru3O11–Bi2O3 Electrodes. Russ J Electrochem 59, 466–472 (2023). https://doi.org/10.1134/S1023193523060034

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  • DOI: https://doi.org/10.1134/S1023193523060034

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