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Passive water management at the cathode of a planar air-breathing proton exchange membrane fuel cell

✍ Scribed by T. Fabian; R. O’Hayre; S. Litster; F.B. Prinz; J.G. Santiago

Publisher
Elsevier Science
Year
2010
Tongue
English
Weight
687 KB
Volume
195
Category
Article
ISSN
0378-7753

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✦ Synopsis

Water management is a significant challenge in portable polymer electrolyte membrane (PEM) fuel cells and particularly in proton exchange membrane (PEM) fuel cells with air-breathing cathodes. Liquid water condensation and accumulation at the cathode surface is unavoidable in a passive design operated over a wide range of ambient and load conditions. Excessive flooding or dry out of the open cathode can lead to a dramatic reduction of fuel cell power. We report a water management design based on a hydrophilic and electrically conductive wick. A prototype air-breathing fuel cell with the proposed water management design successfully operated under severe flooding conditions, ambient temperature 10 • C and relative humidity of 80%, for up to 6 h with no observable cathode flooding or loss of performance.

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