Results 171 to 180 of about 13,237 (207)
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ECS Meeting Abstracts, 2006
Abstract not Available.
Shelley Minteer, Jeanne Kerr
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Abstract not Available.
Shelley Minteer, Jeanne Kerr
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Journal of The Electrochemical Society, 2004
A three-dimensional, single-phase, isothermal numerical model of polymer electrolyte fuel cell ~PEFC! was employed to investigate effects of electron transport through the gas diffusion layer ~GDL! for the first time. An electron transport equation was additionally solved in the catalyst and gas diffusion layers, as well as in the current collector. It
Hua Meng, Chao-Yang Wang
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A three-dimensional, single-phase, isothermal numerical model of polymer electrolyte fuel cell ~PEFC! was employed to investigate effects of electron transport through the gas diffusion layer ~GDL! for the first time. An electron transport equation was additionally solved in the catalyst and gas diffusion layers, as well as in the current collector. It
Hua Meng, Chao-Yang Wang
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ECS Transactions, 2010
Performance decay in a polymer-electrolyte fuel cell can result from changes in the gas-diffusion layer, particularly in the micro-porous layer. Examples and characteristics of this decay will be presented here. Performance decay is greater with exposure to potential cycles than with exposure to constant high potential holds.
Mike L. Perry, Tim Patterson, Tom Madden
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Performance decay in a polymer-electrolyte fuel cell can result from changes in the gas-diffusion layer, particularly in the micro-porous layer. Examples and characteristics of this decay will be presented here. Performance decay is greater with exposure to potential cycles than with exposure to constant high potential holds.
Mike L. Perry, Tim Patterson, Tom Madden
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Effects of Chloride Contamination On PEFCs
ECS Meeting Abstracts, 2013Abstract not Available.
Md. Aman Uddin +6 more
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Oxide-Supported PEFC Electrocatalysts
ECS Meeting Abstracts, 2015Even after the start of the commercialization of fuel cell vehicles from December 2014, further improvement of PEFC electrocatalysts is still desired for the next-generation PEFCs. While the Pt-based electrocatalyst supported on carbon black is the state-of-the-art material, further development using alternative electrocatalyst support materials are ...
Kazunari Sasaki +8 more
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Alternative Oxide-Supported PEFC Electrocatalysts
ECS Meeting Abstracts, 2014Even though the commercialization of fuel cell vehicles may start from 2015 in some countries, the durability of electrocatalysts is still an important technological issue. Among various degradation mechanisms, start-stop-cycle up to a high potential can cause carbon corrosion related degradation [1-3], one of the major degradation mechanisms of fuel ...
Kazunari Sasaki +8 more
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ASME 2009 7th International Conference on Nanochannels, Microchannels and Minichannels, 2009
Polymer electrolyte fuel cells (PEFCs) are one of the most interesting alternatives for a pollution-free electrical energy production in many applications where a highly reliable source of electricity is needed. One of the major challenges in the development of PEFCs is to exploit the whole capacity that is inherent to a given membrane electrode ...
Kaspar Andreas Friedrich +2 more
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Polymer electrolyte fuel cells (PEFCs) are one of the most interesting alternatives for a pollution-free electrical energy production in many applications where a highly reliable source of electricity is needed. One of the major challenges in the development of PEFCs is to exploit the whole capacity that is inherent to a given membrane electrode ...
Kaspar Andreas Friedrich +2 more
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ECS Transactions, 2009
Water transport within a polymer electrolyte fuel cell (PEFC) electrode has been probed. A method to reveal tortuosity within the PEFC electrode is demonstrated. NMR relaxation and diffusion measurements are applied to yield information about molecular local interaction and long range diffusion, respectively, within the electrode sample.
Che-Nan Sun, Thomas A. Zawodzinski
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Water transport within a polymer electrolyte fuel cell (PEFC) electrode has been probed. A method to reveal tortuosity within the PEFC electrode is demonstrated. NMR relaxation and diffusion measurements are applied to yield information about molecular local interaction and long range diffusion, respectively, within the electrode sample.
Che-Nan Sun, Thomas A. Zawodzinski
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Current density distribution in PEFC
Journal of Power Sources, 2005Abstract The determination of the current distribution in a polymer electrolyte fuel cell (PEFC) is of great practical importance to optimize the process parameter such as the flow field design, the humidification of reaction gases and the utilization of the fuel gas. In this paper, subcells approach is used to measure current density distribution in
Zhixiang Liu +4 more
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Characterizing Degradation in PEFC
ECS Meeting Abstracts, 2010Abstract not Available.
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