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Abstract
Oxides in which total electrical conductivity is determined by the partial conductivities of three types of charge carriers i.e. holes/ electrons, oxygen ions, and protons are key components of well-functioning proton ceramic fuel cells. Apart from electrochemical properties also easily modified microstructure is an important feature of the electrodes. In the paper, a group of SrTi1−xFexO3−δ (STF, x = 0.2–0.8) perovskites prepared by solid-state synthesis was studied. The microstructure of ceramics was studied using SEM, and the results showed a significant influence of Fe amount on the grain size and material’s porosity. The electrical transport results show a different conductivity in a dry and humidified atmosphere. The hydration kinetics related to the water incorporation are presented with the transition from single-fold to two-fold behaviour, related to the proton-electron hole interaction observed in measurements. The obtained results strictly show a triple-conductivity of SrTi0.8Fe0.2O3−δ system at a lower temperature range, where the protonic defects are thermodynamically stable.
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Authors (7)
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Piotr Winiarz dr inż.
- Wydział Energetyki i Paliw, Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie
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- Category:
- Articles
- Type:
- artykuły w czasopismach
- Published in:
-
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
no. 169,
ISSN: 0013-4651 - Language:
- English
- Publication year:
- 2022
- Bibliographic description:
- Miruszewski T., Skubida W., Winiarz P., Dzierzgowski K., Mielewczyk-Gryń A., Wachowski S., Gazda M.: Proton-Electron Hole Interactions in Sr(Ti,Fe)O3−δ Mixed-Conducting Perovskites// JOURNAL OF THE ELECTROCHEMICAL SOCIETY -Vol. 169,iss. 5 (2022), s.054522-
- DOI:
- Digital Object Identifier (open in new tab) 10.1149/1945-7111/ac6e8f
- Sources of funding:
-
- Project Triple conducting oxides
- Verified by:
- Gdańsk University of Technology
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