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 Wysłany: Wto 9:32, 05 Kwi 2011 Temat postu: Nano-Structured Proton Exchange Membrane for Fuel |
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Nano-Structured Proton Exchange Membrane for Fuel Cell
irectmethanolruelcell (DMF ℃) withhighmethanolconcentrationCanbefeasible. Priordesignsaimedtoreducecrossoverbvdis-criminatingwaterandmethanolpermeation, usuallysufferedthelOssofprotonconductivity. Thisdilemmaisresolvedbytakingadvantageofthenovelnano-structuredmembranes, whereproton-conductingchannelsisdecoratedwithcloselyspacedsulfonicgroupsinconnectednano-pores. Theprotontransferisestablishedbythedirectionaltunnelingthroughthesurfacechargefieldcreatedbyfinelydispersednanoflowchanne1. OnesuchdesignisdemonstratedbypolymerizationofsulfonatedphenolicinthePVdFandPVdF-HFPcopolymerssolution. SEMresultsindicatedformationofthincrustofhydrophilicshell (fullofsulfonicgroup) ontheoth-erwisehydrophobicsurface. Thereversemicelleformationyieldachanneldimensionsle88than2nm. Thecloselyspacedarrangementsthusestablishedanovelprotonconductingbehaviorlargelydifferentfromthose696 Fudan University ( Natural Science) Vol.44 reportedpreViously. AsareSuItofthenano-flowstructure, crossoVeriseffectivelyreduced, buttheprot ∞ conductivity (10 a S / cm) isnotsuffered. SincethePVdF-HFPsubstrateispartiallycrystallized,[link widoczny dla zalogowanych], thefilmwithstandsso1ventswe11andpreservedthemembranedimensionseveninhighmethanolconcentration · Thepuctishigh1ychemiandtherlTlallystablemembranesuitablefortheapplicationofdirectmethanolfuelcell (DMFC). Acknowledgement: FlundingofthisresearchisprovidedbyNationa1ScienceCouncil, Taiwan (NSC92-2113-M a 008-012 -), ChinaReferences: [1] ChuPeterP, ReddyMJ, TsaiJoyce. PolymrScience, PartB: PolymerPhys ~ ,2004,42:3866-3875 [2] ReddyMJ, ChuPeterP. J Foot Source ,2004,135:1-8 ·
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