Preparation of radiochemically pore-filled polymer electrolyte membranes for direct methanol fuel cells



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Nasef, M. M. and Zubir, N. A. and Ismail, A. F. and Dahlan, K. Z. M. and Saidi, H. and Khayet Souhaimi, Mohamed (2006) Preparation of radiochemically pore-filled polymer electrolyte membranes for direct methanol fuel cells. Journal of power sources, 156 (2). pp. 200-210. ISSN 0378-7753

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Polymer electrolyte pore-filled membranes, for possible use in direct methanol fuel cells (DMFCs), have been prepared by radiochemical grafting of styrene into porous poly(vinylidene fluoride) (PVDF) films using simultaneous irradiation with an electron beam (EB) followed by a sulfonation reaction. The physico-chemical properties of the obtained polystyrene sulfortic acid pore-filled membranes are evaluated using Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), ac impedance, and a methanol diffusion cell. The effects of variation of the grafting yield (Y%) on the ionic conductivity and the methanol permeability of the membranes are investigated. The ionic conductivity of the membranes increases with increase in Y% and exceeds that of the perfluorinated ionomer membrane, Nafion 117, at a grafting yield of 46%. The methanol penneability of 40 and 46% pore-filled membranes is lower than that of Nation 117 by 53 and 71 %, respectively. The performance characteristic factor suggests that these membranes are potential candidates for DMFC applications.

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© 2005 Elsevier B.V. N.A. Zubir wishes to thank the Malaysian Ministry of Science, Technology and Innovation (MOSTI) for a fellowship awarded under the National Science Fellowship (NSF) programme. Thanks are also due to Rosiah Rohani, Tg. Ida Sofina Ngah, and Nur Amzira Sulaiman from the Membrane Research Unit, Universiti Teknologi Malaysia for their assistance in reproducing some of the membrane samples.

Uncontrolled Keywords:Proton-exchange membranes, Microfiltration membranes, Pervaporation, Polysulfone, Performance, Mixtures, Films
Subjects:Sciences > Physics > Thermodynamics
ID Code:27074
Deposited On:14 Oct 2014 12:39
Last Modified:19 Apr 2016 16:16

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