Understanding the dynamic behaviour of direct methanol fuel cells: Response to step changes in cell current

Krewer, Ulrike; Kamat, Ashish; Sundmacher, Kai

doi:10.1016/j.jelechem.2007.06.015

Cited by 37 publications

(37 citation statements)

References 33 publications

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“…This explanation is consistent with the experiment results studied by Kallo et al [4]. However, another modeling study [23] showed that anode reaction was the main physicochemical process that causes the cell voltage overshooting. This was contradictory to the earlier study [22].…”

Section: Introductionsupporting

confidence: 91%

Modeling of dynamic operating behaviors in a liquid-feed direct methanol fuel cell

Yang

2012

International Journal of Hydrogen Energy

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Section: Introductionsupporting

confidence: 91%

Modeling of dynamic operating behaviors in a liquid-feed direct methanol fuel cell

Yang

2012

International Journal of Hydrogen Energy

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“…He also developed a full cell model for 28 cm 2 DMFC to predict current density and methanol distribution. Krewer et al [8] analysed the anode electrochemical reaction, which causes anode potential. They developed a model for three different flow field designs (parallel channel, spotted and rhomboidal) to predict methanol distribution and concluded that the cell voltage is influenced by low methanol concentration and low methanol flow rate.…”

Section: Introductionmentioning

confidence: 99%

Experimental and Numerical Study of Serpentine Flow Fields for Improving Direct Methanol Fuel Cell Performance

Sudaroli

Kolar

2015

Fuel Cells

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Methanol crossover is an important issue as it affects direct methanol fuel cell (DMFC) performance. But it may be controlled by selecting a proper flow field design. Experiments were carried out to investigate the effect of single, double and triple serpentine flow field configurations on a DMFC with a 25 cm 2 membrane electrode assembly (MEA) with a constant open ratio. A three dimensional model was also developed for the anode of the DMFC to predict methanol concentration and cell current density distributions. Experimental and model results show that at lower methanol concentrations (0.25-0.5M), single serpentine flow field (SSFF) provides high peak power density, while a double serpentine flow field (DSFF) gives high peak power density at a high methanol concentration (1-2M). Single and double serpentine flow fields exhibit the same peak power density (33 mW cm -2 ) at 1M. But the cell efficiency of double serpentine flow field is 12.5% which is 3.5% point greater than single serpentine flow field. This is attributed to reduced mixed potential. triple serpentine flow field (TSFF) shows the lowest peak power density and cell efficiency, which is attributed to high mass transfer resistance.

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“…Direct methanol fuel cells (DMFCs) have been acknowledged as a promising energy source for portable electronic devices because they convert chemical energy directly into electrical energy with high efficiency and low emission of pollutants [1][2][3]. However, DMFCs have problems that must be overcome in order to realize their potential.…”

Section: Introductionmentioning

confidence: 99%

Electrocatalytic performance of bimetallic platinum–ruthenium nanoclusters supported on graphite nanofibers

Park

Seo

2010

Current Applied Physics

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Understanding the dynamic behaviour of direct methanol fuel cells: Response to step changes in cell current

Cited by 37 publications

References 33 publications

Modeling of dynamic operating behaviors in a liquid-feed direct methanol fuel cell

Modeling of dynamic operating behaviors in a liquid-feed direct methanol fuel cell

Experimental and Numerical Study of Serpentine Flow Fields for Improving Direct Methanol Fuel Cell Performance

Electrocatalytic performance of bimetallic platinum–ruthenium nanoclusters supported on graphite nanofibers

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