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Analysis of gas diffusion layer and flow-field design in a PEMFC using neutron radiography

Record type: Article

A carbon-cloth gas diffusion layer (GDL) displays better performance than a carbon-paper GDL under humidified conditions. A straight flow field displays better performance than a serpentine flow field. To investigate these phenomena, neutron radiography was used to compare the amount of liquid water that accumulated in test fuel cells. It was found that a larger amount of water accumulated in a carbon-cloth GDL than in a carbon-paper GDL. From the viewpoint of cell performance, the carbon-cloth GDL was less influenced by the accumulated water than the carbon-paper GDL. It is assumed that the broader pore distribution of a carbon-cloth GDL creates oxygen-diffusion paths even if water accumulates in the GDL. With a serpentine flow field, water accumulated in the corner and the gas bypassed the flow field. These phenomena are the main causes of performance deterioration with a serpentine flow field.

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Citation

Yoshizawa, Koudai, Ikezoe, Keigo, Tasaki, Yutaka, Kramer, Denis, Lehmann, Eberhard and Scherer, Günther (2008) Analysis of gas diffusion layer and flow-field design in a PEMFC using neutron radiography Journal of the Electrochemical Society, 155, (3), B223-B227. (doi:10.1149/1.2823003).

More information

Published date: 2 January 2008
Organisations: Engineering Mats & Surface Engineerg Gp

Identifiers

Local EPrints ID: 189737
URI: http://eprints.soton.ac.uk/id/eprint/189737
ISSN: 0013-4651
PURE UUID: 124d3e28-f663-4a65-9c6b-7968916c82f2

Catalogue record

Date deposited: 06 Jun 2011 13:50
Last modified: 18 Jul 2017 11:40

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Contributors

Author: Koudai Yoshizawa
Author: Keigo Ikezoe
Author: Yutaka Tasaki
Author: Denis Kramer
Author: Eberhard Lehmann
Author: Günther Scherer

University divisions


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