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@ARTICLE{Rhrens:808518,
author = {Röhrens, Daniel and Neumann, A. and Beez, A. and Vinke, I.
C. and de Haart, L.G.J. and Menzler, N. H.},
title = {{F}ormation of chromium containing impurities in
({L}a,{S}r){M}n{O}$_{3}$ solid-oxide-fuel-cell cathodes
under stack operating conditions and its effect on
performance},
journal = {Ceramics international},
volume = {42},
number = {8},
issn = {0272-8842},
address = {Amsterdam [u.a.]},
publisher = {Elsevier Science},
reportid = {FZJ-2016-02258},
pages = {9467 - 9474},
year = {2016},
abstract = {In this study, we present an investigation of the
chromium-related electrical performance degradation of
anode-supported SOFCs with a LSM/YSZ composite cathode. A
traditional ferritic interconnect steel with high chromium
content is established as the primary chromium source and
chromium poisoning of the cathode is carried out at relevant
SOFC operating conditions. The prolonged influence of the
gaseous chromium species on the cell performance and cathode
microstructure under constant current conditions was
examined quantitatively. Physical deposition of
chromium(III) compounds (mainly spinel-type (Cr,Mn)3O4
phases) was observed at the electrochemically active region
adjacent to the electrolyte only under realistic constant
current conditions. The microstructural degradation
associated with the formation of secondary phases correlated
directly with the performance degradation, the effective
chromium partial pressure and the current density.
Furthermore, the influence of the presence of a number of
protecting layers on the interconnect steel was evaluated
with regard to the cathode poisoning. It was shown that
chromium-induced degradation was reduced drastically when an
additional manganese reservoir layer and a Cr getter layer
were applied.},
cin = {IEK-1 / IEK-9},
ddc = {670},
cid = {I:(DE-Juel1)IEK-1-20101013 / I:(DE-Juel1)IEK-9-20110218},
pnm = {135 - Fuel Cells (POF3-135) / SOFC - Solid Oxide Fuel Cell
(SOFC-20140602) / HITEC - Helmholtz Interdisciplinary
Doctoral Training in Energy and Climate Research (HITEC)
(HITEC-20170406)},
pid = {G:(DE-HGF)POF3-135 / G:(DE-Juel1)SOFC-20140602 /
G:(DE-Juel1)HITEC-20170406},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000374811600020},
doi = {10.1016/j.ceramint.2016.03.010},
url = {https://juser.fz-juelich.de/record/808518},
}