Results 181 to 190 of about 327,547 (230)
Real time measurements of methanol crossover in a DMFC
Journal of Power Sources, 2007 Methanol crossover is a serious problem in a direct methanol fuel cell (DMFC), which causes significant voltage loss and waste of fuel. Due to methanol crossover, most DMFCs must operate on a fuel with a very low methanol concentration; yet very low methanol concentration also causes a poor cell performance.
Hongtan Liu
exaly +3 more sources
Journal of Power Sources, 2011 This experimental work aims to investigate the possibility to reduce methanol crossover in DMFC mod- ifying diffusion layer characteristics. Improvements in crossover measurement are firstly proposed, permitting to conclude that in the investigated conditions carbon dioxide flow through the membrane can be neglected.
Carlo Santoro +2 more
exaly +6 more sources
Reduction of methanol crossover in a flowing electrolyte-direct methanol fuel cell
International Journal of Hydrogen Energy, 2017 Abstract The flowing electrolyte-direct methanol fuel cell (FE-DMFC) is a type of fuel cell in which a flowing liquid electrolyte is used, in addition to two solid membranes, to reduce methanol crossover. In this study, FE-DMFCs having new materials and design were manufactured and studied. In this design, the flow field plates were made of stainless
Detlef Stolten +2 more
exaly +6 more sources
A review on methanol crossover in direct methanol fuel cells: challenges and achievements
International Journal of Energy Research, 2011 Mahmoud Ahmed, İbrahim Dinçer
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A review of the state-of-the-art of the methanol crossover in direct methanol fuel cells
Journal of Power Sources, 1999Abstract Direct (oxidation) methanol fuel cells (DMFCs) are attractive for several applications, however, there are several barriers which must be overcome before they can become an alternative to internal combustion engines. At present, methanol crossover from the anode to the cathode appears to be the major limitation.
A Heinzel
exaly +2 more sources
Direct measurement of methanol crossover fluxes under land and channel in direct methanol fuel cells
International Journal of Hydrogen Energy, 2015 Methanol crossover in Direct Methanol Fuel Cells (DMFCs) has a drastic adverse effect on the performance of the cell. Thus, the measurement of methanol crossover flux is of a great importance.
Hongtan Liu, Saif Almheiri
exaly +2 more sources
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
Zhangxun Xia, Gongquan Sun, Fulai Qi
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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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Nanofludic Analysis on Methanol Crossover of Direct Methanol Fuel Cells
ASME 2008 First International Conference on Micro/Nanoscale Heat Transfer, Parts A and B, 2008Direct methanol fuel cells (DMFCs) are considered as a competitive power source candidate for portable electronic devices. Nafion® has been widely used for the electrolyte of DMFCs because of its good proton conductivity and high chemical and mechanical stability.
Peng-Yu Chen, Wei-Hui Chen, Che-Wun Hong
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Methanol and water crossover in a passive liquid-feed direct methanol fuel cell
International Journal of Hydrogen Energy, 2010Abstract Methanol crossover, water crossover, and fuel efficiency for a passive liquid-feed direct methanol fuel cell (DMFC) were all experimentally determined based on the mass balance of the cell discharged under different current loads. The effects of different operating conditions such as current density and methanol concentration, as well as the
Chao Xu, Xianglin Li, Amir Faghri
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