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SPECIAL SECTION ON THE 2ND EUROPEAN FUEL CELL TECHNOLOGY AND APPLICATIONS CONFERENCE

Fabrication of High Precision PEMFC Membrane Electrode Assemblies by Sieve Printing Method

[+] Author and Article Information
Alexandre B. Andrade

 Instituto de Pesquisas Energéticas e Nucleares (IPEN)/CNEN-SP, Avenida Professor Lineu Prestes 2242, Cidade Universitária, São Paulo, São Paulo 05508-000, Brazilabodart@ipen.br

Martha L. Mora Bejarano1

 Instituto de Pesquisas Energéticas e Nucleares (IPEN)/CNEN-SP, Avenida Professor Lineu Prestes 2242, Cidade Universitária, São Paulo, São Paulo 05508-000, Brazilmmora@ipen.br

Edgar F. Cunha

 Instituto de Pesquisas Energéticas e Nucleares (IPEN)/CNEN-SP, Avenida Professor Lineu Prestes 2242, Cidade Universitária, São Paulo, São Paulo 05508-000, Brazilefcunha@ipen.br

Eric Robalinho

 Instituto de Pesquisas Energéticas e Nucleares (IPEN)/CNEN-SP, Avenida Professor Lineu Prestes 2242, Cidade Universitária, São Paulo, São Paulo 05508-000, Brazileric@ipen.br

Marcelo Linardi

 Instituto de Pesquisas Energéticas e Nucleares (IPEN)/CNEN-SP, Avenida Professor Lineu Prestes 2242, Cidade Universitária, São Paulo, São Paulo 05508-000, Brazilmlinardi@ipen.br

1

Corresponding author.

J. Fuel Cell Sci. Technol 6(2), 021305 (Mar 03, 2009) (3 pages) doi:10.1115/1.3080556 History: Received January 30, 2008; Revised April 10, 2008; Published March 03, 2009

A sieve printing technique has been developed for the preparation of gas diffusion electrodes for proton exchange membrane fuel cells (PEMFCs). The results of the preparation of membrane electrode assemblies (MEAs) are shown to be faster and highly reproducible by using the sieve printing and hot pressing method. These results were compared with those obtained by spray and hot pressing method. The experiments were carried out in a 25cm2 single PEM fuel cell with platinum loadings of 0.4mgPtcm2 and 0.6mgPtcm2 on the anode and cathode, respectively. Scanning electron microscopy analysis was used to investigate the electrodes’ morphology. The performance of the MEAs was measured by polarization curves. It was observed that the sieve printing technique is highly reproducible and significantly more accurate and faster than the spray one. Sieve printing technique can be easily scaled up and is very adequate for high volume production with low-cost. Such features allow manufacturing large active areas for power stack fabrication. In addition, this deposition technique has produced MEAs with a 39.8% higher power density at 0.6 V when compared with the spray one.

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Copyright © 2009 by American Society of Mechanical Engineers
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Figures

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Figure 1

Semi-automatic screen printer (EKRA)

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Figure 2

SEM micrographs of the top-view of the MEAs manufactured by (a) spray and (b) sieve printing methods, and cross-cuts of the MEAs manufactured by (c) spray and (d) sieve printing methods

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Figure 3

Polarization curves (solid symbols) and power density curves (open symbols) for MEAs manufactured by spray and sieve printing methods. Cell temperature 70°C, H2(85°C)/O2, and atmospheric pressure.

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