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@ARTICLE{Verbraeken:185504,
author = {Verbraeken, M. C. and Ramos, T. and Agersted, K. and Ma, Q.
and Savaniu, C. D. and Sudireddy, B. R. and Irvine, J. T. S.
and Holtappels, P. and Tietz, F.},
title = {{M}odified strontium titanates: from defect chemistry to
{SOFC} anodes},
journal = {RSC Advances},
volume = {5},
number = {2},
issn = {2046-2069},
address = {London},
publisher = {RSC Publishing},
reportid = {FZJ-2014-06931},
pages = {1168 - 1180},
year = {2015},
abstract = {Modified strontium titanates have received much attention
recently for their potential as anode material in solid
oxide fuel cells (SOFC). Their inherent redox stability and
superior tolerance to sulphur poisoning and coking as
compared to Ni based cermet anodes could improve durability
of SOFC systems dramatically. Various substitution
strategies can be deployed to optimise materials properties
in these strontium titanates, such as electronic
conductivity, electrocatalytic activity, chemical stability
and sinterability, and thus mechanical strength.
Substitution strategies not only cover choice and amount of
substituent, but also perovskite defect chemistry,
distinguishing between A-site deficiency (A1−xBO3) and
cation-stoichiometry (ABO3+δ). Literature suggests distinct
differences in the materials properties between the latter
two compositional approaches. After discussing the defect
chemistry of modified strontium titanates, this paper
reviews three different A-site deficient donor (La, Y, Nb)
substituted strontium titanates for their electrical
behaviour and fuel cell performance. Promising performances
in both electrolyte as well as anode supported cell designs
have been obtained, when using hydrogen as fuel.
Performances are retained after numerous redox cycles. Long
term stability in sulphur and carbon containing fuels still
needs to be explored in greater detail},
cin = {IEK-1},
ddc = {540},
cid = {I:(DE-Juel1)IEK-1-20101013},
pnm = {135 - Fuel Cells (POF3-135)},
pid = {G:(DE-HGF)POF3-135},
typ = {PUB:(DE-HGF)16 / PUB:(DE-HGF)36},
UT = {WOS:000346079900040},
doi = {10.1039/C4RA09751C},
url = {https://juser.fz-juelich.de/record/185504},
}