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@ARTICLE{Dixon:13715,
author = {Dixon, D. and Schröder, A. and Schökel, A. and Söhn, M.
and Manke, I. and Karjilov, N. and Sanders, T. and Loos, V.
and Hoogers, G. and Stolten, D. and Wippermann, K. and Roth,
C.},
title = {{D}esign of in-situ experimentation for the study of fuel
cells with {X}-rays and neutrons},
journal = {Materials testing: Materialprüfung ; materials and},
volume = {52},
issn = {0025-5300},
address = {München},
publisher = {Hanser},
reportid = {PreJuSER-13715},
pages = {725 - 735},
year = {2010},
note = {Record converted from VDB: 12.11.2012},
abstract = {In situ neutron and X-ray measurements are of essential
importance for the rational design of tailor-made catalysts
and cell components, in particular when they can be
performed with spatial resolution. Neutron radiography
allows the investigation of the local fluid distribution in
direct methanol fuel cells (DMFCs) under operating
conditions with spatial resolutions in the order of some
tens of micrometers. In the through-plane mode, an overview
of the local water and gas distribution in the flow field
channels is obtained, while the in-plane mode provides
information on spatially and time resolved fluid
distribution across the cell, hydration/dehydration
processes and water distribution across the walls of flow
field channels. Combined studies of high resolution neutron
radiography and segmented cell measurements are especially
valuable, because they enable a correlation of the local
fluid distribution and local performance. This knowledge is
essential in order to optimise water management and
performance and to establish a homogeneous fluid, current
and temperature distribution in order to achieve high
performance and durability of DMFCs. While the neutron
studies focus on the cell components, additional information
about the catalyst performance and stability is obtained by
in situ X-ray absorption spectroscopy (XAS), thus nicely
complementing the neutron measurements. Particle size and
particle composition as well as degradation processes by
oxidation, de-alloying, and particle growth can be probed
with spatial resolution during operation. However, both for
neutron and X-ray investigations dedicated cell and
experiment design are crucial for the success of the
measurements.},
keywords = {J (WoSType)},
cin = {IEK-3 / JARA-ENERGY},
ddc = {620},
cid = {I:(DE-Juel1)IEK-3-20101013 / $I:(DE-82)080011_20140620$},
pnm = {Rationelle Energieumwandlung},
pid = {G:(DE-Juel1)FUEK402},
shelfmark = {Materials Science, Characterization $\&$ Testing},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000285023800010},
url = {https://juser.fz-juelich.de/record/13715},
}