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000041937 0247_ $$2DOI$$a10.1016/j.jpowsour.2005.03.219
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000041937 084__ $$2WoS$$aElectrochemistry
000041937 084__ $$2WoS$$aEnergy & Fuels
000041937 1001_ $$0P:(DE-Juel1)VDB13439$$aGhosh, P. C.$$b0$$uFZJ
000041937 245__ $$aIn situ approach for current distribution measurement in fuel cells
000041937 260__ $$aNew York, NY [u.a.]$$bElsevier$$c2006
000041937 300__ $$a184 - 191
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000041937 440_0 $$03727$$aJournal of Power Sources$$v154$$x0378-7753
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000041937 520__ $$aIn 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.
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000041937 65320 $$2Author$$apolymer electrolyte fuel cell
000041937 65320 $$2Author$$acurrent density distribution
000041937 65320 $$2Author$$ain situ measurement
000041937 7001_ $$0P:(DE-Juel1)VDB44719$$aWüster, T.$$b1$$uFZJ
000041937 7001_ $$0P:(DE-Juel1)VDB2044$$aDohle, H.$$b2$$uFZJ
000041937 7001_ $$0P:(DE-Juel1)129867$$aKimiaie, N.$$b3$$uFZJ
000041937 7001_ $$0P:(DE-Juel1)129888$$aMergel, J.$$b4$$uFZJ
000041937 7001_ $$0P:(DE-Juel1)129928$$aStolten, D.$$b5$$uFZJ
000041937 773__ $$0PERI:(DE-600)1491915-1$$a10.1016/j.jpowsour.2005.03.219$$gVol. 154, p. 184 - 191$$p184 - 191$$q154<184 - 191$$tJournal of power sources$$v154$$x0378-7753$$y2006
000041937 8567_ $$uhttp://dx.doi.org/10.1016/j.jpowsour.2005.03.219
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