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@ARTICLE{Konysheva:57793,
author = {Konysheva, E. and Penkalla, H. and Wessel, E. and Mertens,
J. and Seeling, U. and Singheiser, L. and Hilpert, K.},
title = {{C}hromium poisoning of perovskite cathodes by the {ODS}
alloy {C}r5{F}e1{Y} 2{O}3 and the high chromium ferritic
steel crofer22{APU}},
journal = {Journal of the Electrochemical Society},
volume = {153},
issn = {0013-4651},
address = {Pennington, NJ},
publisher = {Electrochemical Society},
reportid = {PreJuSER-57793},
pages = {A765 - A773},
year = {2006},
note = {Record converted from VDB: 12.11.2012},
abstract = {The alloys Cr5Fe1Y(2)O(3) and the ferritic steel
Crofer22APU are typical alloys used as solid oxide fuel cell
(SOFC) interconnect materials. Alloy Cr5Fe1Y(2)O(3) is an
oxide dispersion strengthened (ODS) alloy developed by
Plansee, Reutte, Austria, for use at high temperature. A
typical material for medium-temperature SOFC, is the high
chromium ferritic steel Crofer22APU supplied by Thyssen
Krupp VDM, Germany. The two alloys form different oxide
scales which affect chromium poisoning. Chromium
vaporization as source term and electrochemical degradation
of La1-xSrxMnO3 (LSM) and La0.58Sr0.4Co0.2Fe0.8O3 (LSCF)
describing the poisoning were studied for the two alloys.
The dynamics of the chromium deposition in porous perovskite
cathodes was studied by a dc method and impedance
spectroscopy. Electrical degradation of the LSM cathode by
alloy Cr5Fe1Y(2)O(3) was significantly higher than for
Crofer22APU. The microstructure of the cells was studied
after measurements by scanning and energy filtering
transmission electron microscopy. Significant amounts of
chromium were observed at the TPB in the functional layer of
cells, with the LSM cathode giving insight into the
degradation mechanism. Cells tested with the LSCF cathode
clearly show Cr poisoning. Formation of large SrCrO4
crystals was observed on the surface of the LSCF cathode.},
keywords = {J (WoSType)},
cin = {IWV-1 / IWV-2 / ZCH / JARA-ENERGY},
ddc = {540},
cid = {I:(DE-Juel1)VDB5 / I:(DE-Juel1)VDB2 /
I:(DE-Juel1)ZCH-20090406 / $I:(DE-82)080011_20140620$},
pnm = {Rationelle Energieumwandlung / SOFC - Solid Oxide Fuel Cell
(SOFC-20140602)},
pid = {G:(DE-Juel1)FUEK402 / G:(DE-Juel1)SOFC-20140602},
shelfmark = {Electrochemistry / Materials Science, Coatings $\&$ Films},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000235723600019},
doi = {10.1149/1.2172563},
url = {https://juser.fz-juelich.de/record/57793},
}