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Lookup NU author(s): Professor Sudipta Roy, Dr Jens Kuhlmann, Emeritus Professor Keith Scott
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The performance of direct methanol fuel cells (DMFC) with radiation grafted polymer electrolyte membranes (PEM) is reported. The membranes used poly ethylene-tetrafluoroethylene (ETFE), poly vinylidene fluoride (PVDF) and low-density polyethylene (LDPE) as base polymer films. The base polymer films were grafted with polystyrene sulfonic acid (PSSA) as proton-conducting groups. The effects of varying the degree of grafting (DOG) and the membrane thickness, which change the ion conductivity and methanol permeability, has a strong influence on methanol crossover of the DMFC and the performance of the DMFC. Typically, increasing the degree of grafting increases the ion conductivity and the methanol crossover. By adjusting the degree of grafting and the membrane thickness, membranes with suitable conductivity and low methanol crossover have been produced. The DMFC performance with such membranes was superior to that of with Nafion® membrane. © 2004 Elsevier B.V. All rights reserved.
Author(s): Shen M, Roy S, Kuhlmann JW, Scott K, Lovell K, Horsfall JA
Publication type: Article
Publication status: Published
Journal: Journal of Membrane Science
Year: 2005
Volume: 251
Issue: 1-2
Pages: 121-130
ISSN (print): 0376-7388
ISSN (electronic): 1873-3123
Publisher: Elsevier BV
URL: http://dx.doi.org/10.1016/j.memsci.2004.11.0061016
DOI: 10.1016/j.memsci.2004.11.006
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