In situ observation of the water distribution across a PEFC using high resolution neutron radiography


Boilat, P., Kramer, D., Seyfang, B.C., Frei, G., Lehmann, E., Scherer, G., Wokaun, A., Ichikawa, Y., Tasaki, Y. and Shinohara, K. (2008) In situ observation of the water distribution across a PEFC using high resolution neutron radiography. Electrochemistry Communications, 10, (4), 546-550. (doi:10.1016/j.elecom.2008.01.018).

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Description/Abstract

The water distribution across the membrane electrolyte assembly (MEA) of a working polymer electrolyte fuel cell (PEFC) was observed in situ using neutron radiography. In order to resolve the distribution between the different layers of the MEA, in plane imaging (cell membrane parallel to the beam) was used. Unprecedented spatial resolution for neutron radiography was obtained using a new detector system available at PSI combined with specific anisotropic resolution enhancement methods. A detrimental effect on performance of excessive water content in the cathode GDL was observed. Depending on the operating condition, a strong separation of the water content between ribs and channel was observed, particularly in the cathode GDL.

Item Type: Article
ISSNs: 1388-2481 (print)
Keywords: fuel cell, neutron radiography, high resolution, water management
Subjects: Q Science > QD Chemistry
T Technology > TK Electrical engineering. Electronics Nuclear engineering
T Technology > TP Chemical technology
Divisions: University Structure - Pre August 2011 > School of Engineering Sciences > Engineering Materials & Surface Engineering
ePrint ID: 189741
Date Deposited: 06 Jun 2011 13:53
Last Modified: 27 Mar 2014 19:42
URI: http://eprints.soton.ac.uk/id/eprint/189741

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