Effect of the thickness of the anode electrode catalyst layers on the performance in direct methanol fuel cells

Glass, Dean E.; Oláh, George A.; Prakash, G. K. Surya

doi:10.1016/j.jpowsour.2017.03.106

Cited by 42 publications

(25 citation statements)

References 38 publications

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“…The drawdowns were performed via a square drawdown bar (BYK) with 8 different thicknesses ranging from 1 mil to 8 mils (1 mil=25.4 μm) as described in our previous study . Drawdowns were performed at layer thicknesses of 1, 4, and 8 mils at Pt loadings of 0.25, 0.50, 1.0, and 2.0 mg cm −2 , respectively, on a Toray carbon paper (E‐Tek, TGH‐060, 6 % wet‐proofing) with an active surface area of 5 cm 2 .…”

Section: Methodssupporting

confidence: 62%

“…At each drawdown layer thickness, the data follows a logarithmic trend for both the O 2 and air with a relatively large increase in maximum power density between the 0.25 mg cm −2 and 0.50 mg cm −2 loadings and a slight increase in maximum power density from the 0.50 mg cm −2 up to the 2.0 mg cm −2 loadings. This concurs with the results from our previous work in which the drawdowns were performed on the anode .…”

Section: Resultsmentioning

confidence: 99%

“…Due to the minute differences in catalyst loadings between the respective layer thicknesses, the normalized power densities (in mW mg −1 ) were calculated and plotted in Figure b. An exponential decay trend is observed as the Pt loadings were increased, indicating a loss in catalyst utilization as reported in earlier research . This trend can be due to the penetration depth of the gases flowing in the cathode side of the MEA.…”

Section: Resultsmentioning

confidence: 99%

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Effect of the Cathode Catalyst Layer Thickness on the Performance in Direct Methanol Fuel Cells

Glass

Prakash

2019

Electroanalysis

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Catalyst deposition control is one of the overlooked areas of fuel cell fabrication and research that can affect the overall performance and cost of the fuel cell to manufacture for mass production. The effect of the different individual catalyst layer thicknesses and loadings of the cathode compartment of a direct methanol fuel cell (DMFC) was investigated. The drawdown method was performed at thicknesses varying from 1 mil to 8 mils with platinum loadings ranging from 0.25 mg cm−2 to 2.0 mg cm−2. The membrane electrode assemblies (MEAs) with thicker individual layers (8 mil and 4 mil) performed better overall compared to the ones prepared with thinner individual layers (1 mil). The power density maxima for the different loading levels followed an exponential decrease of platinum utilization at the higher loading levels. The painted MEAs tended to display the similar performance characteristics as the drawdown MEA layers closest to the thickness at the respective loadings.

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Section: Methodssupporting

confidence: 62%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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Effect of the Cathode Catalyst Layer Thickness on the Performance in Direct Methanol Fuel Cells

Glass

Prakash

2019

Electroanalysis

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“…The flow in the gas diffusion layer is governed by the mass and momentum conservation in a porous medium through the Brinkman equation, as given by equations (7) and (8), 37 where Q br , ε, and K are FIGURE 2 Serpentine and spiral flow field configurations with different designs the mass source term (kg/m 3 ·s), porosity, and permeability, respectively. The flow in the gas diffusion layer is governed by the mass and momentum conservation in a porous medium through the Brinkman equation, as given by equations (7) and (8), 37 where Q br , ε, and K are FIGURE 2 Serpentine and spiral flow field configurations with different designs the mass source term (kg/m 3 ·s), porosity, and permeability, respectively.…”

Section: Governing Equationsmentioning

confidence: 99%

“…b. The flow in the gas diffusion layer is governed by the mass and momentum conservation in a porous medium through the Brinkman equation, as given by equations (7) and (8), 37 where Q br , ε, and K are FIGURE 2 Serpentine and spiral flow field configurations with different designs the mass source term (kg/m 3 ·s), porosity, and permeability, respectively. In the gas diffusion layer, the mass source term disappears because no reaction occurs.…”

Section: Governing Equationsmentioning

confidence: 99%

Performance enhancement of direct methanol fuel cell using multi‐zone narrow flow fields

2019

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Summary New serpentine and spiral flow field configurations were developed to enhance the performance of direct methanol fuel cells (DMFCs). The new configurations are based on two primary concepts, namely, narrowing the flow field and partitioning the total active area of the fuel cell. Three flow channel heights of 0.8, 0.4, and 0.2 mm were investigated in serpentine and spiral flow fields. The main active area is considered a single zone and is partitioned into two‐ and four‐zone designs while maintaining the total inlet mass flow rate of the reactant and oxidant. To determine the performance parameters of the newly proposed designs, a three‐dimensional single‐phase isothermal model was developed, numerically simulated, and validated through experimental measurements. The findings of the current study indicate that a serpentine flow field configuration with a channel height of 0.2 mm and two zones attains an enhancement of the net power density of 37% compared to a conventional single‐zone design with a flow channel height of 0.8 mm. Similarly, for a spiral flow field design, the maximum net power density increased by 26% using a two‐zone configuration with a channel height of 0.2 mm, in comparison to the conventional design of a single‐zone and a flow channel height of 0.8 mm. The newly developed designs utilize the lower height of the flow fields to decrease the dimensions of the fuel cell stacks and reduce the material costs required.

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Fuel Cells

2017

Fuel Cells, Solar Panels and Storage Devices

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Effect of the thickness of the anode electrode catalyst layers on the performance in direct methanol fuel cells

Cited by 42 publications

References 38 publications

Effect of the Cathode Catalyst Layer Thickness on the Performance in Direct Methanol Fuel Cells

Effect of the Cathode Catalyst Layer Thickness on the Performance in Direct Methanol Fuel Cells

Performance enhancement of direct methanol fuel cell using multi‐zone narrow flow fields

Fuel Cells

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