Riegraf, Matthias und Amaya Duenas, Diana Maria und Sata, Noriko und Friedrich, Kaspar Andreas und Costa, Rémi (2021) Performance and Limitations of Nickel-Doped Chromite Anodes in Electrolyte-Supported Solid Oxide Fuel Cells. ChemSusChem. Wiley. doi: 10.1002/cssc.202100330. ISSN 1864-5631.
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Kurzfassung
Ni-doped chromite anodes were integrated into electrolyte-supported cells (ESC) with 5x5 cm2 size and investigated in fuel cell mode with H2/H2O fuel gas. Both a stoichiometric and a nominally A-site deficient chromite anode material showed promising performance at 860 °C approaching the ones of state-of-the-art Ni/Gd-doped ceria (CGO) anodes. While the difference in polarization resistance was small, an increased ohmic resistance of the perovskite anodes was observed, which is related to limited electronic conductivity of the perovskites. Increasing the chromite electrode thickness was shown to enhance performance and stability considerably. Degradation increased with current density, suggesting its dependency on the electrode potential, and could be reversed by redox cycling. Sulfur poisoning with 20 ppm hydrogen sulfide led to rapid voltage drops for the chromite anodes. It is discussed that Ni nanoparticle exsolution facilitates hydrogen dissociation to the extent that it is not rate-limiting at the investigated temperature unless an insufficiently thick electrode thickness is employed or sulfur impurities are present in the feed gas.
elib-URL des Eintrags: | https://elib.dlr.de/143311/ | ||||||||||||||||||||||||
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Dokumentart: | Zeitschriftenbeitrag | ||||||||||||||||||||||||
Titel: | Performance and Limitations of Nickel-Doped Chromite Anodes in Electrolyte-Supported Solid Oxide Fuel Cells | ||||||||||||||||||||||||
Autoren: |
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Datum: | 12 April 2021 | ||||||||||||||||||||||||
Erschienen in: | ChemSusChem | ||||||||||||||||||||||||
Referierte Publikation: | Ja | ||||||||||||||||||||||||
Open Access: | Ja | ||||||||||||||||||||||||
Gold Open Access: | Nein | ||||||||||||||||||||||||
In SCOPUS: | Ja | ||||||||||||||||||||||||
In ISI Web of Science: | Ja | ||||||||||||||||||||||||
DOI: | 10.1002/cssc.202100330 | ||||||||||||||||||||||||
Verlag: | Wiley | ||||||||||||||||||||||||
ISSN: | 1864-5631 | ||||||||||||||||||||||||
Status: | veröffentlicht | ||||||||||||||||||||||||
Stichwörter: | SOFC, SOEC, Ni-free anode | ||||||||||||||||||||||||
HGF - Forschungsbereich: | Energie | ||||||||||||||||||||||||
HGF - Programm: | Materialien und Technologien für die Energiewende | ||||||||||||||||||||||||
HGF - Programmthema: | Chemische Energieträger | ||||||||||||||||||||||||
DLR - Schwerpunkt: | Energie | ||||||||||||||||||||||||
DLR - Forschungsgebiet: | E SP - Energiespeicher | ||||||||||||||||||||||||
DLR - Teilgebiet (Projekt, Vorhaben): | E - Elektrochemische Prozesse | ||||||||||||||||||||||||
Standort: | Stuttgart | ||||||||||||||||||||||||
Institute & Einrichtungen: | Institut für Technische Thermodynamik > Elektrochemische Energietechnik | ||||||||||||||||||||||||
Hinterlegt von: | Riegraf, Matthias | ||||||||||||||||||||||||
Hinterlegt am: | 08 Okt 2021 12:21 | ||||||||||||||||||||||||
Letzte Änderung: | 04 Dez 2023 12:32 |
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