Results 201 to 210 of about 33,730 (224)
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Direct methanol fuel cells : Methanol crossover and its influence on single DMFC performance
Ionics, 2004In the present investigation, the methanol crossover rate through Nafion®-115 membrane at different temperatures and different concentrations had been investigated in a fuel cell test apparatus by using gas chromatography analysis. The singledirect methanol fuel cell (DMFC) tests were carried out to investigate the effect of the concentration of ...
S. Q. Song +6 more
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Methanol crossover through PtRu/Nafion composite membrane for a direct methanol fuel cell
International Journal of Hydrogen Energy, 2007Abstract This study examined methanol crossover through PtRu/Nafion composite membranes for the direct methanol fuel cell. For this purpose, 0.03, 0.05 and 0.10 wt% PtRu/Nafion composite membranes were fabricated using a solution impregnation method.
E JUNG +5 more
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An Electroanalytical Study of Methanol Crossover Through Nafion 117 Membrane
2nd International Conference on Fuel Cell Science, Engineering and Technology, 2004The proton exchange membrane direct methanol fuel cells (PEMDMFC) shows considerably lower performance than the hydrogen fuel cell because of inefficient methanol oxidation and the crossover of the methanol through the membrane that separates the anode from the cathode.
F. Kadirgan, O. Savadogo
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The degree and effect of methanol crossover in the direct methanol fuel cell
Journal of Power Sources, 1998A simple model is presented to describe the permeation of methanol from the anode to the cathode in direct methanol fuel cell (DMFC). Measured permeation rates of water and methanol through Nafion® 117 under varied pressure differentials across the membrane are used to determine key parameters in the model.
John Cruickshank, Keith Scott
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Molecular sieve as an effective barrier for methanol crossover in direct methanol fuel cells
International Journal of Hydrogen Energy, 2020Abstract Methanol crossover is still a significant barrier to the commercialization of direct methanol fuel cells with wide-used Nafion® membrane. Herein, molecular sieve is introduced into the design of polymer electrolyte membrane to alleviate methanol crossover. The UZM-9 zeolite with an intermediate window size of 0.42 nm can effectively separate
Xuejing Sun +5 more
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Journal of Power Sources, 2014
Abstract Methanol crossover and severe degradation are two of the most critical issues hindering the commercialization of direct methanol fuel cells. The experimental investigations found in the literature show that degradation has both permanent and temporary contributions; the latter can be recovered thanks to a suitable operation interruption ...
CASALEGNO, ANDREA +3 more
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Abstract Methanol crossover and severe degradation are two of the most critical issues hindering the commercialization of direct methanol fuel cells. The experimental investigations found in the literature show that degradation has both permanent and temporary contributions; the latter can be recovered thanks to a suitable operation interruption ...
CASALEGNO, ANDREA +3 more
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Reduction of Methanol Crossover in Direct Methanol Fuel Cells Using Electrolyte Flowing Approach
ECS Meeting Abstracts, 2006Abstract not Available.
Shenjiang Xia, Doug James, David Toolsie
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Low Crossover of Methanol and Water Through Thin Membranes in Direct Methanol Fuel Cells
Journal of The Electrochemical Society, 2006Low crossover of both methanol and water through a polymer membrane in a direct methanol fuel cell (DMFC) is essential for using high concentration methanol in portable power applications. A novel design of the membrane-electrolyte assembly (MEA) has been developed in this work to attain low methanol crossover, low water crossover, and high cell ...
Fuqiang Liu, Guoqiang Lu, Chao-Yang Wang
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Journal of Membrane Science, 2006
Abstract We synthesized organically modified silicate microparticles, known as diphenylsilicate (DPS), and showed that the synthesized DPS has a nano-layered microstructure. We utilized this material as a filler for fabricating Nafion®|DPS composite membranes for mitigating the problem of methanol crossover in direct methanol fuel cells (DMFC).
Liang, Zhenxing +2 more
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Abstract We synthesized organically modified silicate microparticles, known as diphenylsilicate (DPS), and showed that the synthesized DPS has a nano-layered microstructure. We utilized this material as a filler for fabricating Nafion®|DPS composite membranes for mitigating the problem of methanol crossover in direct methanol fuel cells (DMFC).
Liang, Zhenxing +2 more
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Volume 5: Energy Systems Analysis, Thermodynamics and Sustainability; NanoEngineering for Energy; Engineering to Address Climate Change, Parts A and B, 2010
One of the major obstacles that currently prevent the widespread applications of DMFCs is the methanol crossover through the proton-exchange membranes (PEM). The present paper discusses the influence of different operating parameters, such as concentration of methanol, pressure, temperature, thickness and equivalent weight of membrane and catalyst ...
Mahmoud Ahmed +2 more
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One of the major obstacles that currently prevent the widespread applications of DMFCs is the methanol crossover through the proton-exchange membranes (PEM). The present paper discusses the influence of different operating parameters, such as concentration of methanol, pressure, temperature, thickness and equivalent weight of membrane and catalyst ...
Mahmoud Ahmed +2 more
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