Polyethylene-based radiation grafted anion-exchange membranes for alkaline fuel cells
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چکیده
منابع مشابه
Alkaline anion-exchange radiation-grafted membranes for possible electrochemical application in fuel cells
Vinylbenzyl chloride was grafted onto PVDF and FEP polymer films using the radiation-grafting methodology. Subsequent reaction with trimethylamine and ion-exchange with potassium hydroxide yields alkaline anion-exchange membranes that are capable of conducting hydroxide ions; such membranes may be suitable for use in low temperature direct methanol fuel cells for portable devices. The PVDF base...
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In present research work, anion exchange membranes based on quaternized polysulfone with ammonium cation moieties (QAPSF) were prepared by chloromethylation, amination and alkalization. The chloromethylated polysulfone were characterized by 1HNMR spectroscopy and functionalization degree was determined according to peak area integration. Ion transport properties (ionic conductivity, ion exchang...
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Recently, Alkaline Polymer Electrolyte Membrane Fuel Cells (APEMFCs) have been attracting worldwide attention mainly due to the prospect of using non–platinum–group metal catalysts. In addition, there is growing evidence that these fuel cells can operate with the presence of carbonate. This mini review will introduce the state–of–the–art in understanding of alkaline anion–exchange membranes (AA...
متن کاملInvestigations of Conductivity in FEP-Based Radiation-Grafted Alkaline Anion-Exchange Membranes
A series of radiation-grafted alkaline anion-exchange membranes (AAEMs) with degrees of grafting (by mass) in the range 20 – 26% were produced and characterised. Conductivities (from impedance spectroscopy) up to 0.023 ± 0.001 S cm at 50 ± 1°C were demonstrated, which are between 20 – 50% of values for the commercial acidform membrane Nafion-115 (σ = 0.045 ± 0.004 (65°C) – 0.104 ± 0.008 (50 ± 1...
متن کاملRadiation–Grafted Alkaline Anion–Exchange Membranes Prepared with Reduced Monomer Quantities
Alkaline anion–exchange membranes (AAEM) for alkaline polymer electrolyte fuel cells (APEFC) were successfully prepared using electron beam irradiated poly(ethylene–co– tetrafluoroethylene) precursor films grafted with vinylbenzyl chloride (VBC) monomer. The resulting chloromethyl groups were subsequently reacted with trimethylamine to form quaternary ammonium anion–exchange functional head–gro...
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ژورنال
عنوان ژورنال: Journal of Membrane Science
سال: 2013
ISSN: 0376-7388
DOI: 10.1016/j.memsci.2013.03.053