TY  - CONF
AU  - Röhrens, Daniel
AU  - Büchler, Oliver
AU  - Sebold, Doris
AU  - Schafbauer, Wolfgang
AU  - Franco, Thomas
AU  - Menzler, Norbert H.
AU  - Buchkremer, Hans Peter
TI  - Microstructural Analysis of a metal-supported SOFC after redox-cycling
IS  - 15
M1  - FZJ-2014-04113
SP  - B1206
PY  - 2014
AB  - A metal-supported SOFC (MSC) has been developed with the aim of an application in an auxiliary power unit (APU) for mobile systems. This cell design is expected to be more robust towards thermo-, mechanical- and chemical stresses that arise during operation of the SOFC-system when compared to the state-of-the-art anode supported cells (ASC). One of the most important cell degradation pathways is the (partial) oxidation of the anode, due to oxygen diffusion into the fuel side of the stack during system shutdown. The oxidation of the nickel catalyst leads to an expansion of the anode and strain is induced within the cell, which might result in microstructural degradation if a critical degree of oxidation is exceeded. MSC-halfcells were exposed to cyclic oxidation conditions by introducing air to the fuel side electrode followed by subsequent reduction in Ar/H2 (4%). A detailed microstructural analysis of the samples is presented. Due to the novel MSC-concept, a higher critical degree of oxidation of nickel is tolerated before irreversible damage and cell failure are observed.
T2  - 11th European SOFC and SOE Forum 2014
CY  - 1 Jul 2014 - 4 Jul 2014, Luzern (Switzerland)
Y2  - 1 Jul 2014 - 4 Jul 2014
M2  - Luzern, Switzerland
LB  - PUB:(DE-HGF)8 ; PUB:(DE-HGF)7
UR  - https://juser.fz-juelich.de/record/154851
ER  -