Electrochemical characterization of vacuum plasma sprayed thin-film solid oxide fuel cells (SOFC) for reduced operating temperatures |
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Authors: | M. Lang T. Franco G. Schiller N. Wagner |
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Affiliation: | (1) Deutsches Zentrum für Luft und Raumfahrt (DLR), Institut für Technische Thermodynamik, Pfaffenwaldring 38-40, D-70569 Stuttgart, Germany |
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Abstract: | This paper focuses on the electrochemical characterization, such as current–voltage measurements, impedance spectroscopy and long-term operation of completely plasma-sprayed SOFC assemblies for a planar metallic substrate-supported thin film concept. The influence of the variation in operating conditions is presented. To determine the different resistances in the cells, the measured impedance spectra were fitted to an equivalent circuit. This enables further improvement of the electrochemical performance of the cells and allows the assembling of high performance SOFC stacks. |
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Keywords: | current– voltage behaviour electrochemical impedance spectroscopy (EIS) solid oxide fuel cells (SOFC) vacuum plasma spraying (VPS) |
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