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

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

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 &ld...

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Bibliographic Details
Main Authors: Mamonova, Veronika Evgenevna, Shubnikova, Elena V., Arapova, Marina Vasilievna, Bragina, Olga A., Nemudry, Alexander P.
Format: Article
Language:English
Published: Saratov State University 2024-12-01
Series:Электрохимическая энергетика
Subjects:
nonstoichiometric oxides
electrode materials
solid oxide fuel cells
electrolyzers
quasiequilibrium oxygen release
Online Access:https://energetica.sgu.ru/sites/energetica.sgu.ru/files/text-pdf/2024/12/electro202404_4-211-215.pdf
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Summary: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.
ISSN:1608-4039
1680-9505

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