Effects of membrane electrode assembly preparation on the polymer electrolyte membrane fuel cell performance |
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Authors: | Th Frey M Linardi |
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Affiliation: | a Center for Solar Energy and Hydrogen Research Baden-Wuerttemberg (ZSW), Division 3: Electrochemical Energy Storage and Conversion, Helmholtzstr. 8, D-89081 Ulm, Germany b Materials Science and Technology Center, Institute of Energy and Nuclear Research (IPEN), Av. Lineu Prestes, 2242 Cidade Universitária, São Paulo, SP, Brazil |
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Abstract: | This paper presents results of recent investigations to develop an optimized in-house membrane electrode assembly (MEA) preparation technique combining catalyst ink spraying and assembly hot pressing. Only easy steps were chosen in this preparation technique in order to simplify the method, aiming at cost reduction. The influence of MEA fabrication parameters like electrode pressing or annealing on the performance of hydrogen fuel cells was studied by single cell measurements with H2/O2 operation. Toray paper and carbon cloth as gas diffusion layer (GDL) materials were compared and the composition of electrode inks was optimized with regard to most favorable fuel cell performance. Commercial E-TEK catalyst was used on the anode and cathode with Pt loadings of 0.4 and 0.6 mg/cm2, respectively. The MEA with best performance delivered approximately 0.58 W/cm2, at 65 °C cell temperature, 80 °C anode humidification, dry cathode and ambient pressure on both electrodes. The results show, that changing electrode compositions or the use of different materials with same functionality (e.g. different GDLs), have a larger effect on fuel cell performance than changing preparation parameters like hot pressing or spraying conditions, studied in previous work. |
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Keywords: | Fuel cell PEMFC Membrane electrode assembly Preparation procedure |
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