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@ARTICLE{VanGestel:19211,
author = {Van Gestel, T. and Sebold, D. and Buchkremer, H.P. and
Stöver, D.},
title = {{A}ssembly of 8{YSZ} nanoparticles into gas-tight 1-2 µm
thick 8{YSZ} electrolyte layers using wet coating methods},
journal = {Journal of the European Ceramic Society},
volume = {32},
issn = {0955-2219},
address = {Amsterdam [u.a.]},
publisher = {Elsevier Science},
reportid = {PreJuSER-19211},
pages = {9 - 26},
year = {2012},
note = {Record converted from VDB: 12.11.2012},
abstract = {The application of a thin film electrolyte layer with a
thickness in the micrometer range could greatly improve
current solid oxide fuel cells (SOFCs) in terms of operating
temperature and power output. Since the achievable minimal
layer thickness with conventional powder coating methods is
limited to similar to 5 mu m, a variety of thin film methods
have been studied, but results on regular large-scale anode
substrates are still lacking in the literature. In this
paper, a wet coating process is presented for fabricating
gas-tight 1-2 mu m thick 8YSZ electrolyte layers on a
regular NiO/8YSZ substrate, with a rough surface, a high
porosity and a large pore size. These layers were deposited
in a similar way as conventional suspension based layers,
but the essential difference includes the use of coating
liquids (nano-dispersion, sol) with a considerably smaller
particle size (85 nm, 60 nm, 35 nm, 6 nm). Successful
deposition of such layers was accomplished by means of an
innovative coating process, which involves the preparation
of a hybrid polyvinyl alcohol/8YSZ membrane by dip-coating
or spin-coating and subsequently burning out the polymer
part at 500 degrees C. Results from He leak tests confirmed
that the sintered layers posses a very low number of defects
and with values in the range 10(-4)-10(-6) (hPa dm(3))/(s
cm(2)) the gas-tightness of the thin film layers is
satisfactory for fuel cell operation. Moreover, preliminary
results have also indicated a potential reduction of the
sintering temperature from 1400 degrees C to the range
1200-1300 degrees C, using the presented coating process.
(C) 2011 Elsevier Ltd. All rights reserved.},
keywords = {J (WoSType)},
cin = {IEK-1},
ddc = {660},
cid = {I:(DE-Juel1)IEK-1-20101013},
pnm = {Rationelle Energieumwandlung / SOFC - Solid Oxide Fuel Cell
(SOFC-20140602)},
pid = {G:(DE-Juel1)FUEK402 / G:(DE-Juel1)SOFC-20140602},
shelfmark = {Materials Science, Ceramics},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000297451400002},
doi = {10.1016/j.jeurceramsoc.2011.07.012},
url = {https://juser.fz-juelich.de/record/19211},
}