Radiation-grafted membranes based on polyethylene for direct methanol fuel cells

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DOIResolve DOI: http://doi.org/10.1016/j.jpowsour.2009.07.021
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TypeArticle
Journal titleJournal of power sources
Volume195
Issue1
Pages2129; # of pages: 9
SubjectFuel cell; Proton exchange membrane; Radiation grafting; Polyethylene; Membrane-electrode assembly
AbstractStyrenewas grafted onto ultrahigh molecularweight polyethylene powder (UHMWPE) by gammairradiation using a 60Co source. Compression moulded films of selected pre-irradiated styrene-grafted ultrahigh molecular weight polyethylene (UHMWPE-g-PS) were post-sulfonated to the sulfonic acid derivative (UHMWPE-g-PSSA) for use as proton exchange membranes (PEMs). The sulfonation was confirmed by Xray photoelectron spectroscopy (XPS). The melting and flow properties of UHMWPE and UHMWPE-g-PS are conducive to forming homogeneous pore-free membranes. Both the ion conductivity and methanol permeability coefficient increased with degree of grafting, but the grafted membranes showed comparable or higher ion conductivity and lower methanol permeability than Nafion® 117 membrane. One UHMWPE-g-PS membrane was fabricated into a membrane–electrode assembly (MEA) and tested as a single cell direct methanol fuel cell (DMFC). Low membrane cost and acceptable fuel cell performance indicate that UHMWPE-g-PSSA membranes could offer an alternative approach to perfluorosulfonic acidtype membranes for DMFC.
Publication date
LanguageEnglish
AffiliationNRC Institute for Chemical Process and Environmental Technology (ICPET-ITPCE); National Research Council Canada
Peer reviewedNo
NRC number51718
NPARC number14281020
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Record identifier2fcba5b4-8367-40b6-80da-98077504a2a4
Record created2010-02-05
Record modified2016-05-09
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