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@ARTICLE{Ghosh:41937,
author = {Ghosh, P. C. and Wüster, T. and Dohle, H. and Kimiaie, N.
and Mergel, J. and Stolten, D.},
title = {{I}n situ approach for current distribution measurement in
fuel cells},
journal = {Journal of power sources},
volume = {154},
issn = {0378-7753},
address = {New York, NY [u.a.]},
publisher = {Elsevier},
reportid = {PreJuSER-41937},
pages = {184 - 191},
year = {2006},
note = {Record converted from VDB: 12.11.2012},
abstract = {In this paper, a new, simple method for measuring the
current density distribution in fuel cells with meander flow
fields is described. This method has been used to
investigate the reactant activity along the meander channel.
The corresponding experimental hardware is very simple,
cost-effective and easy to integrate into the fuel cells. A
thin semi-segmented plate made of expanded graphite serves
as a passive resistor network. The set-up is based on the
idea that the electronic conductivity of the expanded
graphite is relatively low in current direction. For typical
current densities in polymer electrolyte fuel cell (PEFC),
this leads to voltage drops in the range of several
millivolts using usual current densities. On the other hand,
the conductivity in-plane is considerable higher which is
beneficial for equalizing the potential across the segment
area. The new set-up can be used to measure the current
density distribution in a single cell as well as in a stack
at any desired position. The local potential difference
across the graphite plate is caused by the local current
flowing through it. By mapping these potential differences
at different locations, the current distribution in the fuel
cell can be derived. This experimental set-up has been used
to investigate the current distribution of a 240 cm(2) PEFC
single cell with different operating conditions. The
real-time current density distributions measured by the
present method are described in this paper. (c) 2005
Elsevier B.V. All rights reserved.},
keywords = {J (WoSType)},
cin = {IWV-3 / JARA-ENERGY},
ddc = {620},
cid = {I:(DE-Juel1)VDB3 / $I:(DE-82)080011_20140620$},
pnm = {Rationelle Energieumwandlung},
pid = {G:(DE-Juel1)FUEK402},
shelfmark = {Electrochemistry / Energy $\&$ Fuels},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000236310800021},
doi = {10.1016/j.jpowsour.2005.03.219},
url = {https://juser.fz-juelich.de/record/41937},
}