Proton-Electron Hole Interactions in Sr(Ti,Fe)O3−δ Mixed-Conducting Perovskites - Publication - Bridge of Knowledge

Search

Proton-Electron Hole Interactions in Sr(Ti,Fe)O3−δ Mixed-Conducting Perovskites

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.

Citations

  • 1

    CrossRef

  • 0

    Web of Science

  • 1

    Scopus

Cite as

Full text

full text is not available in portal

Keywords

Details

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:
Verified by:
Gdańsk University of Technology

seen 75 times

Recommended for you

Meta Tags