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Impedance analysis of electrolyte processes in a solid oxide cell

Kullmann, Felix ORCID iD icon 1; Großelindemann, Cedric ORCID iD icon 1; Salamon, Luis 1; Fuchs, Franz-Martin; Weber, André ORCID iD icon 1
1 Institut für Angewandte Materialien – Elektrochemische Technologien (IAM-ET1), Karlsruher Institut für Technologie (KIT)

Abstract:

Electrochemical impedance spectroscopy and the distribution of relaxation times are powerful tools to study polarization processes in solid oxide cells (SOC). Commonly the measured polarization resistance is solely attributed to polarization phenomena in the electrodes whereas the electrolyte is assumed to act as purely ohmic series resistance.
In this study an electrolyte supported SOC is investigated by impedance spectroscopy from the nominal operating temperature range of 700–900°C down to temperatures as low as 350°C. At such low temperatures the dielectric polarization of the electrolyte is shifted into the accessible frequency range, providing access to additional processes which are deconvoluted and quantified. It is discussed to which extent the additional layers like gadolinia doped ceria diffusion barrier and electrode layers influence the electrolyte processes as grain and grain boundary.


Verlagsausgabe §
DOI: 10.5445/IR/1000163805
Veröffentlicht am 08.11.2023
Originalveröffentlichung
DOI: 10.1002/fuce.202300035
Scopus
Zitationen: 5
Web of Science
Zitationen: 5
Dimensions
Zitationen: 5
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Angewandte Materialien – Elektrochemische Technologien (IAM-ET1)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2023
Sprache Englisch
Identifikator ISSN: 1615-6846, 1615-6854
KITopen-ID: 1000163805
Erschienen in Fuel Cells
Verlag John Wiley and Sons
Vorab online veröffentlicht am 06.10.2023
Schlagwörter distribution of relaxation times, electrochemical impedance spectroscopy, electrolyte processes, electrolyte supported cell, low temperature, SOC
Nachgewiesen in Dimensions
Web of Science
Scopus
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