Mass transport phenomena in direct methanol fuel cells

Zhao, Tianshou; Xu, C.; Chen, Rong; Yang, Weiwei

doi:10.1016/j.pecs.2009.01.001

Cited by 219 publications

(97 citation statements)

References 136 publications

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“…The amount of crossover methanol is related to current I and methanol concentration c an in the anode channels, yielding a linear dependency on both variables [10,12]:…”

Section: Cell Modelmentioning

confidence: 99%

Increasing Fuel Efficiency of Direct Methanol Fuel Cell Systems with Feedforward Control of the Operating Concentration

Zenith

Krewer

2015

Energies

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Most of the R&D on fuel cells for portable applications concentrates on increasing efficiencies and energy densities to compete with other energy storage devices, especially batteries. To improve the efficiency of direct methanol fuel cell (DMFC) systems, several modifications to system layouts and operating strategies are considered in this paper, rather than modifications to the fuel cell itself. Two modified DMFC systems are presented, one with an additional inline mixer and a further modification of it with a separate tank to recover condensed water. The set point for methanol concentration control in the solution is determined by fuel efficiency and varies with the current and other process variables. Feedforward concentration control enables variable concentration for dynamic loads. Simulation results were validated experimentally with fuel cell systems.

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“…The amount of crossover methanol is related to current I and methanol concentration c an in the anode channels, yielding a linear dependency on both variables [10,12]:…”

Section: Cell Modelmentioning

confidence: 99%

Increasing Fuel Efficiency of Direct Methanol Fuel Cell Systems with Feedforward Control of the Operating Concentration

Zenith

Krewer

2015

Energies

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“…These bubbles generally block the pores used for the methanol diffusion to the catalyst layer, leading to fuel starvation and therefore decreasing the cell performance. A comprehensive review was published on the mass transport phenomena in a DMFC system [20]. For example, in an experiment performed by Lu and Wang [21], the effect of the anode diffusion media of a DMFC was evaluated.…”

Section: Effect Of Anode Diffusion Layermentioning

confidence: 99%

Effect of operating parameters and anode diffusion layer on the direct ethanol fuel cell performance

Alzate

Fatih

Wang

2011

Journal of Power Sources

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Effect of operating parameters and anode diffusion layer on the direct ethanol fuel cell performance Alzate, V.; Fatih, K.; Wang, H. 196 (2011) a b s t r a c t A parametric study was conducted on the performance of direct ethanol fuel cells. The membrane electrode assemblies employed were composed of a Nafion ® 117 membrane, a Pt/C cathode and a PtRu/C anode. The effect of cathode backpressure, cell temperature, ethanol solution flow rate, ethanol concentration, and oxygen flow rate were evaluated by measuring the cell voltage as a function of current density for each set of conditions. The effect of the anode diffusion media was also studied. It was found that the cell performance was enhanced by increasing the cell temperature and the cathode backpressure. On the contrary, the cell performance was virtually independent of oxygen and fuel solution flow rates. Performance variations were encountered only at very low flow rates. The effect of the ethanol concentration on the performance was as expected, mass transport loses observed at low concentrations and kinetic loses at high ethanol concentration due to fuel crossover. The open circuit voltage appeared to be independent of most operating parameters and was only significantly affected by the ethanol concentration. It was also established that the anode diffusion media had an important effect on the cell performance. Journal of Power SourcesCrown

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“…Direct Methanol Fuel Cell (DMFC) is a type of fuel cell with electrolyte polymer membrane that has the potential to be the future energy source because of its advantages, such as high energy conversion, efficient, simple design, and easy to operate [1]. The protons produced from methanol at the anode are transported through a conductive membrane to the cathode, followed by reaction with oxygen and an electron to accomplish the electrochemical reaction.…”

Section: Introductionmentioning

confidence: 99%

Chitosan-ABS membrane for DMFC: Effect of sulfonation time and mass ratio of chitosan and ABS

Hidayati¹,

Mujiburohman²,

Abdillah³

et al. 2018

AIP Conference Proceedings

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Abstract. Direct Methanol Fuel Cell (DMFC) is fuel cell that converts directly chemical energy in methanol into electrical energy and can be used as a power source for portable electric devices. Compared to Proton Exchange Membrane Fuel Cells (PEMFCs) which use hydrogen as the fuel, DMFC has some advantages, yet methanol-crossover remains a challenge to be solved. In this study, Acrylonitrile Butadiene Styrene (ABS) and chitosan were blended and their characteristics as membrane for DMFC were evaluated. Membranes with variation of chitosan and ABS mass ratio (60:40 and 80:20) and sulfonation time (6, 12, 18, and 24 hours) were prepared and the characteristics such as water uptake, swelling degree, ion exchange capacity and methanol permeability were determined. Both chitosan and ABS mass ratio and time of sulfonation influence the investigated responses. As a result, blended chitosan and ABS is feasible as the DMFC membrane.

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Mass transport phenomena in direct methanol fuel cells

Cited by 219 publications

References 136 publications

Increasing Fuel Efficiency of Direct Methanol Fuel Cell Systems with Feedforward Control of the Operating Concentration

Increasing Fuel Efficiency of Direct Methanol Fuel Cell Systems with Feedforward Control of the Operating Concentration

Effect of operating parameters and anode diffusion layer on the direct ethanol fuel cell performance

Chitosan-ABS membrane for DMFC: Effect of sulfonation time and mass ratio of chitosan and ABS

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