Celtec-V: a polybenzimidazole-based membrane for the direct methanol fuel cell
Celtec-V: a polybenzimidazole-based membrane for the direct methanol fuel cell
Celtec-V is a proton exchange membrane based on polybenzimidazole (PBI) comprising an interpenetrating network of polyvinylphosphonic acid designed for application in the direct methanol fuel cell. The properties and fuel cell performance of Celtec-V are investigated and compared against a Nafion 117 standard. It is shown that with the PBI-based membrane, fuel cell performance can be sustained to higher methanol feed concentration at around half the methanol crossover rate. Above 1.0 M methanol, Celtec-V outperforms Nafion 117. Furthermore, lower water permeation is observed, with Celtec-V having an electro-osmotic drag coefficient of around 1 compared to a value of 4-5 for Nafion 117. Room for improvement is identified in the ohmic resistance of the membrane and the cathode-membrane interface, where higher losses are observed at increasing current density.
direct methanol fuel cells, proton exchange membrane fuel cells, current density
B981-B987
Gubler, Lorenz
65f0fe8d-c74e-4313-bbd0-d81b5e4c1e47
Kramer, Denis
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Belack, Jörg
70e14059-51cb-46bc-8795-adaa8330e4fa
Ünsal, Ömer
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Schmidt, Thomas J.
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Scherer, Günther G.
56ef4270-8ab3-4836-b50a-2647c6d9d2cc
30 July 2007
Gubler, Lorenz
65f0fe8d-c74e-4313-bbd0-d81b5e4c1e47
Kramer, Denis
1faae37a-fab7-4edd-99ee-ae4c30d3cde4
Belack, Jörg
70e14059-51cb-46bc-8795-adaa8330e4fa
Ünsal, Ömer
f943d90c-e2dc-4af3-8e3b-8bff1309e267
Schmidt, Thomas J.
27eaeede-d918-4d17-b54f-e75006475455
Scherer, Günther G.
56ef4270-8ab3-4836-b50a-2647c6d9d2cc
Gubler, Lorenz, Kramer, Denis, Belack, Jörg, Ünsal, Ömer, Schmidt, Thomas J. and Scherer, Günther G.
(2007)
Celtec-V: a polybenzimidazole-based membrane for the direct methanol fuel cell.
Journal of the Electrochemical Society, 154 (9), .
(doi:10.1149/1.2754078).
Abstract
Celtec-V is a proton exchange membrane based on polybenzimidazole (PBI) comprising an interpenetrating network of polyvinylphosphonic acid designed for application in the direct methanol fuel cell. The properties and fuel cell performance of Celtec-V are investigated and compared against a Nafion 117 standard. It is shown that with the PBI-based membrane, fuel cell performance can be sustained to higher methanol feed concentration at around half the methanol crossover rate. Above 1.0 M methanol, Celtec-V outperforms Nafion 117. Furthermore, lower water permeation is observed, with Celtec-V having an electro-osmotic drag coefficient of around 1 compared to a value of 4-5 for Nafion 117. Room for improvement is identified in the ohmic resistance of the membrane and the cathode-membrane interface, where higher losses are observed at increasing current density.
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Published date: 30 July 2007
Keywords:
direct methanol fuel cells, proton exchange membrane fuel cells, current density
Organisations:
Engineering Mats & Surface Engineerg Gp
Identifiers
Local EPrints ID: 189821
URI: http://eprints.soton.ac.uk/id/eprint/189821
ISSN: 0013-4651
PURE UUID: 3cf3a263-22e6-4529-a4ac-b126252bbd80
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Date deposited: 13 Jun 2011 10:19
Last modified: 14 Mar 2024 03:36
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Contributors
Author:
Lorenz Gubler
Author:
Jörg Belack
Author:
Ömer Ünsal
Author:
Thomas J. Schmidt
Author:
Günther G. Scherer
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