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Research Papers

Effect of Gas Diffusion Layer With Double-Side Microporous Layer Coating on Polymer Electrolyte Membrane Fuel Cell Performance

[+] Author and Article Information
Min-Hsing Chang

e-mail: mhchang@ttu.eu.tw
Department of Mechanical Engineering,
Tatung University,
Taipei 104, Taiwan

1Corresponding author.

Contributed by the Advanced Energy Systems Division of ASME for publication in the JOURNAL OF FUEL CELL SCIENCE AND TECHNOLOGY. Manuscript received October 25, 2012; final manuscript received January 15, 2013; published online March 21, 2013. Editor: Nigel M. Sammes.

J. Fuel Cell Sci. Technol 10(2), 021005 (Mar 21, 2013) (6 pages) Paper No: FC-12-1110; doi: 10.1115/1.4023841 History: Received October 25, 2012; Revised January 15, 2013

In this study, the performance of a polymer electrolyte membrane fuel cell with double-side microporous layer (MPL) coating on gas diffusion layer (GDL) is investigated experimentally. A standard commercial SGL® 10BA carbon paper is used as the substrate and it is coated with MPL on both sides of the paper with different composition. Three different carbon powders are used in the experiments, including Vulcan XC-72R, Acetylene black, and Black Pearls 2000. The effect of polytetrafluoroethylene (PTFE) content is also considered. A single cell testing apparatus is constructed to measure the cell performance and evaluate the effect of GDL with double-side MPL coating. Accordingly, the optimal fabrication parameters of double-side MPL are determined. The result shows that under the same operating conditions, the performance of fuel cell using GDL with double-side MPL is better than that using general single-side MPL. The Acetylene black is found to give the best cell performance than the others. The optimal composition of MPL on the surfaces facing to the catalyst layer and flow-channel plate are 1.25 mg/cm2 and 0.25 mg/cm2, respectively. Besides, the optimal PTFE content is the same on both sides of MPL which is found to be 20 wt%.

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References

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Figures

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Fig. 1

The polarization and corresponding power density curves at different carbon loadings of Vulcan XC-72R on both sides of GDL facing to catalyst layer/flow channel in unit of mg/cm2

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Fig. 2

The polarization and corresponding power density curves at different carbon loadings of Acetylene black on both sides of GDL facing to catalyst layer/flow channel in unit of mg/cm2

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Fig. 3

The polarization and corresponding power density curves at different carbon loadings of BP 2000 on both sides of GDL facing to catalyst layer/flow channel in unit of mg/cm2

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Fig. 4

Impedance spectra at different carbon loadings of Acetylene black on both sides of GDL facing to catalyst layer/flow channel in unit of mg/cm2 with a current density of 500 mAcm−2

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Fig. 5

Variations in ohmic resistance, charge transfer resistance, and gas transfer resistance with carbon loading of Acetylene black on the surface facing to the side of flow channel at current density 500 mAcm−2. The total carbon loading of both sides is fixed at 1.0 mg/cm2.

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Fig. 6

Cyclic voltammograms of electrodes with different carbon loadings of Acetylene black on both sides of GDL facing to catalyst layer/flow channel in unit of mg/cm2

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Fig. 7

The polarization and corresponding power density curves at different carbon loadings of Acetylene black on the side of GDL facing to catalyst layer in unit of mg/cm2

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Fig. 8

The polarization and corresponding power density curves at different carbon loadings of Acetylene black on the side of GDL facing to flow channel in unit of mg/cm2

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Fig. 9

The polarization and corresponding power density curves at different PTFE contents in the MPL next to catalyst layer with carbon loadings (AB) of 1.25/0.25 mg/cm2

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Fig. 10

Impedance spectra at different PTFE contents in the MPL next to catalyst layer measured at current density 1000 mA/cm2

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Fig. 11

Variations in ohmic resistance, charge transfer resistance, and gas transfer resistance with PTFE content in the MPL next to catalyst layer at current density 1000 mAcm−2. The PTFE content in the MPL next to the flow channel plate is fixed at 20 wt%.

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Fig. 12

The polarization and corresponding power density curves at different PTFE contents in the MPL next to flow channel plate with carbon loadings (AB) of 1.25/0.25 mg/cm2

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