ISSN 1608-4039 (Print)
ISSN 1680-9505 (Online)

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Mamonova V. E., Shubnikova E. V., Arapova M. V., Bragina O. A., Nemudry A. P. Quasi-equilibrium oxygen release from oxides used as electrodes in solid oxide fuel cells and electrolyzers. Electrochemical Energetics, 2024, vol. 24, iss. 4, pp. 211-215. DOI: 10.18500/1608-4039-2024-24-4-211-215, EDN: VWVQDH

This is an open access article distributed under the terms of Creative Commons Attribution 4.0 International License (CC-BY 4.0).
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Language: 
Russian
Heading: 
Fuel cells
Article type: 
Article
UDC: 
544.22.022.342
DOI: 
10.18500/1608-4039-2024-24-4-211-215
EDN: 
VWVQDH

Quasi-equilibrium oxygen release from oxides used as electrodes in solid oxide fuel cells and electrolyzers

Autors: 
Mamonova Veronika Evgenevna, Institute of Chemistry of a Solid body and Mechanochemistry of the Siberian Branch of RAS
Shubnikova Elena V. , Institute of Chemistry of a Solid body and Mechanochemistry of the Siberian Branch of RAS
Arapova Marina Vasilievna, Institute of Chemistry of a Solid body and Mechanochemistry of the Siberian Branch of RAS
Bragina Olga A., Institute of Chemistry of a Solid body and Mechanochemistry of the Siberian Branch of RAS
Nemudry Alexander P., Institute of Chemistry of a Solid body and Mechanochemistry of the Siberian Branch of RAS
Abstract: 

The dependence of oxygen stoichiometry on the oxygen partial pressure and the temperature for La- and Nb-doped strontium ferrite La0.4Sr0.6Fe0.95Nb0.05O3 – δ (LSFNb5) was studied by quasi-equilibrium oxygen release (QEOR) method. The equilibrium diagram in the coordinates “T – lg(pO2 ) – 3 – δ” in the temperature range of 700–900°C and oxygen partial pressures pO2 = 10–4 – 0.2 atm was obtained. The range of stoichiometry deviation was determined, and the thermodynamic parameters of the oxygen release process were analyzed.

Key words: 
nonstoichiometric oxides
electrode materials
solid oxide fuel cells
electrolyzers
quasiequilibrium oxygen release
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Received: 
15.10.2024
Accepted: 
28.10.2024
Published: 
25.12.2024