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Nafion: A Thermodynamic Sketch
ECS Meeting Abstracts, 2016Nafion®, the most commonly employed ion exchange polymer, serves as both a separator and a sensor platform. After more than 30 years of use, properties of Nafion have been measured and various models of Nafion have been proposed. Many properties of Nafion have been measured as a function of water content and hydration [1]. This includes
Johna Leddy, Nadeesha Rathuwadu
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ECS Meeting Abstracts, 2015
In the conventional catalyst layer of polymer electrolyte fuel cells, the ionomer (e.g. Nafion) exists as an ultra-thin film (4-10 nm thick) coating the Pt/C catalyst aggregates. Recent studies [1-12], including those from our group, have begun to investigate the properties and structure of such thin ionomer films.
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In the conventional catalyst layer of polymer electrolyte fuel cells, the ionomer (e.g. Nafion) exists as an ultra-thin film (4-10 nm thick) coating the Pt/C catalyst aggregates. Recent studies [1-12], including those from our group, have begun to investigate the properties and structure of such thin ionomer films.
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Journal of The Electrochemical Society, 2000
The performance of a polymer electrolyte fuel cell is critically dependent on the water uptake in the polymer electrolyte, usually Nafion. Nafion in solution is often painted onto the electrodes of the fuel cell. It is important that this cast Nafion film stay amorphous and not crystallize. Cast Nafion films, ca.
M. Ludvigsson +2 more
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The performance of a polymer electrolyte fuel cell is critically dependent on the water uptake in the polymer electrolyte, usually Nafion. Nafion in solution is often painted onto the electrodes of the fuel cell. It is important that this cast Nafion film stay amorphous and not crystallize. Cast Nafion films, ca.
M. Ludvigsson +2 more
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Proton transport through aqueous Nafion membrane
The European Physical Journal E, 2009We introduce a new model for proton transport through a single proton-conducting channel of an aqueous Nafion membrane based on a mechanism in which protons move under electrostatic effect provided by the sulfonate (SO3-)groups of the Nafion side chains, the spin effect of active components, the hydrogen bonding effect with water molecules, and the ...
D N, Son, H, Kasai
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Precipitation of ferrites in Nafion® membranes
Journal of Applied Polymer Science, 1996Iron oxide particles were precipitated in Nafion® 117 perfluorinated ion-exchange membranes using four different methods. Precipitated ferrites yielded magnetically responsive nanocomposite films and probed structural variations in the membrane. Optical microscopy, transmission electron microscopy, vibrating sample magnetometry (VSM), and Mossbauer ...
Louise Raymond +3 more
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Electrokinetic Measurements of Thin Nafion Films
Langmuir, 2014We perform an electrokinetic characterization of ~300 nm Nafion films deposited on glass slides over a relatively unexplored region of ionic strength and pH. Owing to the small pore size of the Nafion, we probe the Nafion-fluid interface with the streaming potential measurement, and we probe ionic transport through the entire thickness of the Nafion ...
Alexander C, Barbati, Brian J, Kirby
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Quenching of Excited in Nafion Ionomer Solution and in Nafion Membrane
Molecular Crystals and Liquid Crystals, 2009The behavior of excited with the electron–acceptor quenchers methyl viologen and C60F36 in ethanol containing Nafion ionomer and in the water nanochannels of Nafion membrane was investigated by measurement of luminescence quenching. In Nafion ionomer solution, and methyl viologen are adsorbed onto Nafion aggregates, whereas C60F36 is held in Nafion ...
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Ion transport in Nafion® 117 membrane
Journal of Electroanalytical Chemistry, 1997The overall transport characteristics of different cationic species in Nafion® 117 membrane are presented. Equilibrium salt and solvent uptake by the membrane are determined in order to obtain the membrane chloride concentration, the membrane porosity and membrane water content.
Lehmani, A. +4 more
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Interfacial Structure of Nafion
ECS Meeting Abstracts, 2015While ion-conducting materials are primarily considered for their use as electrolytes (which depend upon their bulk properties, i.e. conductivity, crossover rejection, and material strength) their interfacial properties are becoming increasingly relevant for optimizing electrochemical devices.
Joseph A. Dura +2 more
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