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Aerosol Deposition of barium-based perovskites as solid electrolyte film for fuel cells


Exner, Jörg ; Nazarenus, Tobias ; Pöpke, Hendrik ; Fuchs, Franz-Martin ; Kita, Jaroslaw ; Moos, Ralf:
Aerosol Deposition of barium-based perovskites as solid electrolyte film for fuel cells.
Veranstaltung: 42nd International Conference and Expo on Advanced Ceramics and Composites : ICACC18 , 21.-26.01.2018 , Daytona Beach, Fla., USA.
(Veranstaltungsbeitrag: Kongress/Konferenz/Symposium/Tagung , Poster )


Solid oxide fuel cells (SOFC) are of interest for clean and reliable energy conversion technologies. State of the art SOFCs based on ScSZ or YSZ (scandia or yttria stabilized zirconia) electrolytes that conduct oxide ions. Typically, they require high temperatures above 800 °C. In contrast, barium- or strontium-based perovskites are receiving increased attention due to their potential use as proton conducting membranes that could already be operated at temperatures of 500 °C and even below. However, a major drawback of these materials limiting their commercial use is the high sintering temperature of 1500 °C to 1700 °C. To overcome the necessity of sintering, we intended to form dense and well-adhering perovskite films by Aerosol Deposition (AD). The unique feature of this spray coating technique is the possibility to form dense, nanocrystalline ceramic films directly from the ceramic powder without the need for a heat treatment during or after deposition. Three different compounds were synthesized, namely barium zirconate (BaZrO₃), barium cerate (BaCeO₃) and barium stannate (BaSnO₃). Each compound was doped with 10 % and 20 % yttrium, respectively. Resulting films are dense and between 2 μm and 10 μm thick. The crystal structure of the powder was retained during coating and was still present in films. Especially BaZrO₃ and BaCeO₃ films feature high conductivities of up to 0.01 S/cm at 800 °C.

Weitere Angaben

Publikationsform: Veranstaltungsbeitrag (Poster)
Begutachteter Beitrag: Ja
Zusätzliche Informationen: Poster ICACC-S3-P014-2018
Institutionen der Universität: Fakultäten > Fakultät für Ingenieurwissenschaften
Fakultäten > Fakultät für Ingenieurwissenschaften > Lehrstuhl Funktionsmaterialien > Lehrstuhl Funktionsmaterialien - Univ.-Prof. Dr.-Ing. Ralf Moos
Profilfelder > Advanced Fields > Neue Materialien
Forschungseinrichtungen > Forschungszentren > Bayreuther Materialzentrum - BayMAT
Fakultäten > Fakultät für Ingenieurwissenschaften > Lehrstuhl Funktionsmaterialien
Profilfelder > Advanced Fields
Forschungseinrichtungen > Forschungszentren
Titel an der UBT entstanden: Ja
Themengebiete aus DDC: 600 Technik, Medizin, angewandte Wissenschaften > 620 Ingenieurwissenschaften
Eingestellt am: 15 Feb 2018 12:48
Letzte Änderung: 15 Feb 2018 12:54
URI: https://eref.uni-bayreuth.de/id/eprint/42293