Results 111 to 120 of about 32,428 (162)
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Inorganic Proton Exchange Membranes
ASME 2006 Fourth International Conference on Fuel Cell Science, Engineering and Technology, Parts A and B, 2006Direct Methanol Fuel Cells (DMFCs) offer advantages from quick refills to the elimination of recharge times. They show the most potential in efficient chemical to electrical energy conversion, but currently one major source of inefficiency within the DMFC system is the electrolyte allowing fuel to cross over from the anode to cathode.
Timothy Reissman +5 more
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Synthesis and Characterization of Polyurethanic Proton Exchange Membranes
Journal of Fuel Cell Science and Technology, 2011Novel proton exchange membranes have been prepared by in synthesis functionalization of a polyurethane matrix with a sulfonic group containing chain terminals. The synthesis procedure was based on the use of two polyethylene glycols with nominal molecular weight of 300 and 1 k and 4,4′ dicyclohexylmethane diisocyanate in presence of the sodium salt of ...
BOTTINO, ALDO +3 more
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A comparison of alkaline and proton exchange membrane electrolyzers
Russian Journal of Physical Chemistry A, 2008Faraday efficiencies and energy consumptions of a small commercial proton exchange membrane (PEM) and an alkaline electrolyzer designed at our laboratory and equipped with different cathode materials were determined. Our experimental data indicate that the alkaline electrolyzer has a higher Faraday efficiency than the PEM electrolyzer, but, on the ...
Stojić, Dragica Lj. +3 more
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Proton Transfer in Proton Exchange Membrane Based on RDF
Advanced Materials Research, 2011PEM fuel cell is the most promising application as an automotive power. Proton transfer in PEM is one of important factors to understand the performance of PEM fuel cell. In this paper, the proton transfer mechanisms are analyzed by the molecular simulation based on the basic principle of molecular dynamics.
Zhe Sun +4 more
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Mesoscale Simulation of Proton Transport in Proton Exchange Membranes
The Journal of Physical Chemistry C, 2012Previous efforts to model proton transport through fuel cell membranes have largely focused on disparate length scales: molecular dynamics at the atomistic level and fuel cell stack engineering app...
Ryan Jorn, Gregory A. Voth
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Energy, 2018
Abstract Mechanical degradation, caused by local stress concentration and variation, significantly affects the lifetime of proton exchange membrane fuel cells. This study constitutes the first numerical investigation of stress evolution in the membrane between the frame of the membrane exchange assembly (MEA) and gas diffusion layer (GDL) throughout ...
Diankai Qiu +4 more
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Abstract Mechanical degradation, caused by local stress concentration and variation, significantly affects the lifetime of proton exchange membrane fuel cells. This study constitutes the first numerical investigation of stress evolution in the membrane between the frame of the membrane exchange assembly (MEA) and gas diffusion layer (GDL) throughout ...
Diankai Qiu +4 more
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A Review of Fluorinated Proton Exchange Membrane
Advanced Materials Research, 2014The proton exchange membrane (PEM) plays a key role on performance of PEM fuel cell. This paper reviewed recent developments of perfluorinated and partially fluorinated PEMs for PEM fuel cells.Comparative analysis of various PEM parameters was presented.
Shi Zhong Chen, Shi Yu Xing
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2009
Operation and Alternative Proton Conductors 166 3.4 Future Directions 170 References 171Proton exchange membranes (PEMs) are a key component in PEM fuel cells (PEMFCs) and an area of active research in commercial, government, and academic institutions. In this chapter, the review of PEM materials is divided into two sections.
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Operation and Alternative Proton Conductors 166 3.4 Future Directions 170 References 171Proton exchange membranes (PEMs) are a key component in PEM fuel cells (PEMFCs) and an area of active research in commercial, government, and academic institutions. In this chapter, the review of PEM materials is divided into two sections.
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States of Water in Proton Exchange Membranes
ECS Meeting Abstracts, 2008Abstract not Available.
Abhishek Roy +5 more
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Proton Exchange Membrane Electrochemical Capacitors
Proceedings of the 25th Intersociety Energy Conversion Engineering Conference, 2005Disclosed is a high-energy-density all-solid ionomer electrochemical capacitor, completely free of liquid electrolyte. The capacitor includes 1) a three-dimensional metal oxide-particulate-ionomer composite electrode structure, whereby the ionomer coats the individual particles and provides a mechanism for continuous proton transport throughout the ...
S. Sarangapani +4 more
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