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@ARTICLE{Fang:888941,
author = {Fang, Qingping and de Haart, Ute and Schäfer, Dominik and
Thaler, Florian and Rangel-Hernández, Victor and Peters,
Roland and Blum, Ludger},
title = {{D}egradation {A}nalysis of an {SOFC} {S}hort {S}tack
subject to 10,000 {H}ours of {O}peration},
journal = {Journal of the Electrochemical Society},
volume = {167},
number = {14},
issn = {1945-7111},
address = {Bristol},
publisher = {IOP Publishing},
reportid = {FZJ-2020-05340},
pages = {144508 -},
year = {2020},
abstract = {A four-layer solid oxide fuel cell stack consisting of
standard anode-supported cells was assembled to investigate
long-term stability, but at higher current densities and/or
fuel utilization compared to previous investigations. The
stack was operated within a furnace temperature range of 700
°C–750 °C with hydrogen fuel at a current density of up
to 1 Acenterdotcm−2 and fuel utilization of up to $80\%$
for more than 10,000 h. The average voltage degradation rate
was approximately $0.6\%kh−1.$ Increases in the ohmic
resistance and anode polarization dominated the degradation
behavior. An increase in the current density and fuel
utilization under current testing conditions did not
fundamentally influence the degradation rate. However, the
possible modification in the nickel structure by local
higher fuel utilization may have had a long-term impact on
the lifetime of the stack. The complexity of the degradation
analysis of stacks resulting from an inhomogeneous contact
inside the stack was analyzed with the support of impedance
measurements and a post-mortem analysis.},
cin = {IEK-14},
ddc = {660},
cid = {I:(DE-Juel1)IEK-14-20191129},
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:000594744100001},
doi = {10.1149/1945-7111/abc843},
url = {https://juser.fz-juelich.de/record/888941},
}