Mahreni, Mahreni and Mohamad, A.B. and Kadhum, A.A.H. and Daud, Wan Ramli Wan (2008) ELECTROCHEMICAL PROPERTIES IMPROVEMENT OF PROTON EXCHANGE MEMBRANE FUEL CELL (PEMFC) USING NANOCOMPOSITE ELECTROLYTE MEMBRANE. In: Sriwijaya International Seminar on Energy Scienceand Tecnology 2008 (SISEST-2008), 5-6 Nopember, Universitas Sriwijaya,Palembang.


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ABSTRACT Nafion-Silica oxide (SiO2)-Phosphotungstic acid (PWA) composite membrane have been synthesized using solution phase sol-gel method. The effect of the weight ratio of Nafion:SiO2:PWA to the electrochemical properties of composite membrane when applies as electrolyte in the PEMFC was investigated using Fuel Cell Test System (FCTS) at temperature of range of 80 – 90 oC and 40% relative humidity (RH). The weight ratio of the composite membrane samples varied in the range of 100:2.88:1.15, 100:4.33:1.73 and 100:5.76:2.30 and designated as NS10W, NS15W and NS20W, respectively. The aim of the experiment was to insert the inorganic hygroscopic and high conductivity filler like PWA and SiO2 in the Nafion matrix to order to improve the water retention, proton conductivity (σ), hydrogen crossover (β), and thermal stability in addition to increase PEMFC performance at elevated temperature and low RH condition. The result showed when appropriately embeded in the Nafion cluster, the hydrated PWA and SiO2 were endowed in the composite membrane with their high proton conductivity, while retaining the desirable mechanical properties of the polymer film. The water uptake rate and the conductivity of the composite membranes was enhanced with the increase in SiO2 and PWA weight content, after which it is reduced when the ratio of Nafion:SiO2:PWA became 100:4.33:1.73. However, the conductivity of all the composite membranes were higher compare to the Nafion membrane at cell operation condition of 80 – 90 oC and 40% RH. While hydrogen crossover through the composite is lower than Nafion 112 membrane. This study indicated that Nafion-SiO2-PWA composite membrane can be a viable substitute for Nafion for PEMFC which showed good conductivity comparable to Nafion 112 at temperature nearing 100 oC, bearing in mind that Nafion-SiO2-PWA composite membranes have better thermal stability. Keywords: Nafion; electrochemical processes; hydrogen crossover; PEMFC; composite membrane

Item Type: Conference or Workshop Item (Paper)
Subjects: T Technology > TP Chemical technology
Divisions: Faculty of Engineering, Science and Mathematics > School of Chemistry
Depositing User: Dr Mahreni Mahreni
Date Deposited: 23 Apr 2019 02:31
Last Modified: 23 Apr 2019 02:31
URI: http://eprints.upnyk.ac.id/id/eprint/19330

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