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@ARTICLE{Fang:874017,
author = {Fang, Qingping and Blum, Ludger and Stolten, Detlef},
title = {{E}lectrochemical {P}erformance and {D}egradation
{A}nalysis of an {SOFC} {S}hort {S}tack {F}ollowing
{O}peration of {M}ore than 100,000 {H}ours},
journal = {Journal of the Electrochemical Society},
volume = {166},
number = {16},
issn = {1945-7111},
address = {Pennington, NJ},
publisher = {Electrochemical Soc.},
reportid = {FZJ-2020-01177},
pages = {F1320-F1325},
year = {2019},
abstract = {From August 2007 to January 2019, a two-layer solid oxide
fuel cell (SOFC) short stack of a planer design with
zirconia-based, anode-supported cells (ASC) and ITM
interconnectors (with $26\%$ chromium content) was tested
with hydrogen and compressed air at a furnace temperature of
700°C for more than 100,000 hours, of which ~93,000 were in
constant current mode, with a current density of 0.5 Acm−2
and with a fuel utilization of $40\%.$ The calculated
voltage degradation rate slowly decreased, from ~8.0 mV/kh
$(~1.0\%/kh)$ for the first 40,000 h to ~1.4 mV/kh
$(~0.2\%/kh)$ for the subsequent operation under load,
indicating different dominating degradation mechanisms. The
average voltage and area-specific resistance (ASR)
degradation rates for the complete operating period under
electrical load were $0.5\%/kh$ and $2.5\%/kh,$
respectively. Electrochemical impedance spectroscopy (EIS)
was also implemented at the end of the testing period for
the purpose of electrochemical characterization and a
degradation analysis. The post-mortem analysis of the stack
is currently in preparation. In this study, the performance
and degradation behavior of the stack and cells are analyzed
and discussed on the basis of the electrochemical
measurements collected.},
cin = {IEK-14 / IEK-3},
ddc = {660},
cid = {I:(DE-Juel1)IEK-14-20191129 / I:(DE-Juel1)IEK-3-20101013},
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:000503243300001},
doi = {10.1149/2.0751916jes},
url = {https://juser.fz-juelich.de/record/874017},
}