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@ARTICLE{Beez:850227,
author = {Beez, Alexander and Schiemann, Kevin and Menzler, Norbert
H. and Bram, Martin},
title = {{A}ccelerated testing of chromium poisoning of
sr-containing mixed conducting solid oxide cell air
electrodes},
journal = {Frontiers in energy research},
volume = {6},
number = {70},
issn = {2296-598X},
address = {Lausanne},
publisher = {Frontiers Media},
reportid = {FZJ-2018-04282},
pages = {1-8},
year = {2018},
abstract = {A straightforward method for accelerated testing of Cr
poisoning phenomena on mixed ionic and electronic conducting
(MIEC) Solid Oxide Cell (SOC) air electrode materials was
developed. Cr2O3-powder is mixed with an organic matrix and
screen printed onto anode-supported button cells with
(La,Sr)(Co,Fe)O3−δ (LSCF) cathode. Then, a thermal
treatment was conducted to achieve the formation of a
well-defined amount of SrCrO4 on the cathode surface within
only a few hours. For the proof of concept, single cell
measurements were done to investigate the influence of this
new kind of Cr deposition. As reference, a cell poisoned via
gas phase diffusion and a cell without any Cr contamination
were characterized in the same manner. According to the
impedance data, the polarization resistance for both cells,
which were contaminated with Cr species, increased. The
expected relationship between deposited amount of Cr and
increase of polarization resistance was found. ICP-OES
analysis proves the high reproducibility of the method as
the Cr content is only a function of the Cr paste
composition and almost independent of external poisoning
conditions. Due to its scalability and reproducibility, this
method is proposed to be a new tool for screening of cathode
materials and the investigation of different stages of Cr
poisoning prior to more sophisticated and time consuming
investigations like stack tests.},
cin = {IEK-1 / IEK-9},
ddc = {333.7},
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)},
pid = {G:(DE-HGF)POF3-135 / G:(DE-Juel1)SOFC-20140602},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000440400500001},
doi = {10.3389/fenrg.2018.00070},
url = {https://juser.fz-juelich.de/record/850227},
}