Effects of cathode flow fields on direct methanol fuel cell-simulation study

Jung, Guo-Bin; Su, Ay; Tu, Cheng-Hsin; Lin, Yung-Chi; Weng, Fang-Bor; Chan, S. H.

doi:10.1016/j.jpowsour.2006.12.063

Cited by 46 publications

(29 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Methanol crossover causes mixed potential resulting in lowering of cell voltage, lowering of fuel and system efficiency. In a DMFC, the functions of anode and cathode flow field are supply and distribution of methanol solution and air, respectively, to the electrodes [5][6][7][8][9][10][11][12]. The distribution of the fuel on the electrode surface should ideally be as uniform as possible to ensure a uniform performance across the electrode surface.…”

Section: Introductionmentioning

confidence: 99%

Effect of anode and cathode flow field depths on the performance of liquid feed direct methanol fuel cells (DMFCs)

et al. 2012

View full text Add to dashboard Cite

The effect of the anode and cathode flow field depths on the performance of a single cell Direct methanol fuel cell (DMFC) of 45 cm 2 active area were experimentally investigated. Double serpentine flow fields (DSFFs) with varying channel depth namely, 0.2, 0.4, 0.6, 0.8, and 1 mm but with fixed channel and rib width each of 1 mm on both anode and cathode were designed, fabricated, and tested. The experimental study involved measurement of pressure drops across anode and cathode flow field plates, polarization, and carbon dioxide concentration measurements at various current densities. The mass transport at both anode and cathode were found to increase with increase in pressure drop across the flow field on account of reduced channel depth from 1.0 to 0.4 mm at all current densities. However, further decrease to a channel depth of 0.2 mm was found to be counter-productive with different phenomena operating on either side viz., increased CO 2 slug length on the anode flow channel and increased methanol crossover on the cathode side. Hence, the maximum performance for DMFCs was observed for a channel depth of 0.4 mm on anode and cathode flow fields. A decrease in flow field channel depth at cathode was found to increase the methanol crossover due to convective mass transfer effect.

show abstract

Section: Introductionmentioning

confidence: 99%

Effect of anode and cathode flow field depths on the performance of liquid feed direct methanol fuel cells (DMFCs)

et al. 2012

View full text Add to dashboard Cite

show abstract

“…Different flow field designs have different resistances due to non-equal contact area between the electrode and the flow field plate [17]. Also different fabrication torques result in different contact resistances.…”

Section: Resultsmentioning

confidence: 99%

“…Increasing the fabricating torque gradually generates lowers contact resistance for all the flow field designs. Following the suggestions of Jung et al [17] the fabrication torque of the cell was maintained at a constant value of 40 kgf cm for all the tested designs. Therefore, the effect on contact resistance due to different flow field combinations on the cell performance can be neglected.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Effect of anode and cathode flow field design on the performance of a direct methanol fuel cell

Oliveira

Rangel²

2010

Chemical Engineering Journal

View full text Add to dashboard Cite

“…Jung et al [19] and Park et al [20] studied the effect of cathode flow field on cell performance. Serpentine flow field performs better than parallel and grid flow fields due to high pressure drop and effective removal of water produced.…”

Section: Introductionmentioning

confidence: 99%

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

Sudaroli

Kolar

2015

Fuel Cells

View full text Add to dashboard Cite

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.

show abstract

Effects of cathode flow fields on direct methanol fuel cell-simulation study

Cited by 46 publications

References 23 publications

Effect of anode and cathode flow field depths on the performance of liquid feed direct methanol fuel cells (DMFCs)

Effect of anode and cathode flow field depths on the performance of liquid feed direct methanol fuel cells (DMFCs)

Effect of anode and cathode flow field design on the performance of a direct methanol fuel cell

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

Contact Info

Product

Resources

About