Analysis of gas diffusion layer and flow-field design in a PEMFC using neutron radiography
Analysis of gas diffusion layer and flow-field design in a PEMFC using neutron radiography
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.
B223-B227
Yoshizawa, Koudai
c98c4c9a-8351-49be-b898-64c0805a8784
Ikezoe, Keigo
cc3b4880-d165-457d-a2a3-d57a63dd14ce
Tasaki, Yutaka
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Kramer, Denis
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Lehmann, Eberhard
e471ba21-7811-494f-9fc5-039e424052be
Scherer, Günther
0caf5c36-59f7-4639-a0fc-5dc22d62695a
2 January 2008
Yoshizawa, Koudai
c98c4c9a-8351-49be-b898-64c0805a8784
Ikezoe, Keigo
cc3b4880-d165-457d-a2a3-d57a63dd14ce
Tasaki, Yutaka
609db1c4-e1d1-4988-971e-9da07b9ce853
Kramer, Denis
1faae37a-fab7-4edd-99ee-ae4c30d3cde4
Lehmann, Eberhard
e471ba21-7811-494f-9fc5-039e424052be
Scherer, Günther
0caf5c36-59f7-4639-a0fc-5dc22d62695a
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), .
(doi:10.1149/1.2823003).
Abstract
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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Published date: 2 January 2008
Organisations:
Engineering Mats & Surface Engineerg Gp
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Local EPrints ID: 189737
URI: http://eprints.soton.ac.uk/id/eprint/189737
ISSN: 0013-4651
PURE UUID: 124d3e28-f663-4a65-9c6b-7968916c82f2
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Date deposited: 06 Jun 2011 13:50
Last modified: 14 Mar 2024 03:36
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Author:
Koudai Yoshizawa
Author:
Keigo Ikezoe
Author:
Yutaka Tasaki
Author:
Eberhard Lehmann
Author:
Günther Scherer
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