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Title:
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Water transport in the proton-exchange-membrane fuel cell: measurements of the effective drag coefficient
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Author(s):
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Published by:
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Publication date:
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ECN
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1-10-2000
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ECN report number:
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Document type:
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ECN-RX--00-033
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Article (scientific)
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Number of pages:
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33
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Published in: Journal of Power Sources (Elsevier), , 2001, Vol.101, p.117-125.
Abstract:
The water transport in proton-exchange-membrane fuel cells has beenexperimentally investigated by measurements of the effective or net
drag coefficient. Results are presented for a wide range of operating
conditions (current density, temperature, pressure, stoichiometry and
humidity of the inlet gases), as well as for different types of membrane-electrode-assemblies.
It was found that the humidity and the stoichiometry of the inlet gases
had a large effect on the drag. Of the material properties investigated,
the membrane thickness was found to be the most significant paramter.
Inspection of the cell performances showed that drying of the cathode
was much more detrimental for the cell performance than drying of the
anode. This was ascribed to increased activation losses, which turned
out to be extremely sensitive to the type of cathode used.
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