SYNTHESIS AND CHARACTERIZATION THE COMPOSITE ORGANIC-INORGANIC MEMBRANE USING SOL-GEL PROCESS FOR PROTON EXCHANGE MEMBRANE FUEL CELL (PEMFC)

A. Mahreni, Mahreni and A. B. Mohamad, Mohamad and A. A. H. Kadhum, Kadhum and W. R. W. Daud, Daud (2008) SYNTHESIS AND CHARACTERIZATION THE COMPOSITE ORGANIC-INORGANIC MEMBRANE USING SOL-GEL PROCESS FOR PROTON EXCHANGE MEMBRANE FUEL CELL (PEMFC). RSCE-SOMCHE 2008, II. pp. 467-471. ISSN ISBN: 978-983-2982-23-4

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Abstract

Nafion-silicon oxide (SiO2)-phosphotungstic acid (PWA) composite membrane has been synthesized for medium temperature Proton Exchange Membrane Fuel Cell (PEMFC) application using sol-gel method. X-ray diffraction (XRD) was used to determine saturated absorption of PWA in the silica matrix. A transparent film was achieved at annealing temperature of 140oC over 10 hours duration. The film than was characterized by Scanning Electron Microscope (SEM), Transmission Electron Microscope (TEM) and Fourier Transform Infrared Spectroscopy (FTIR). The SEM and TEM results indicated homogenous structure of the Nafion-SiO2-PWA composite membrane with SiO2 and PWA particles size less then 10 nm. X-Ray Diffraction (XRD) result showed that the maximum loading of PWA in the SiO2 matrix is in the ratio of PWA/SiO2 equal to 0.45 (wt./wt.). The vibration absorption peak of Si-O-Si bond at 800 cm-1 and W-O-W at 755 cm-1 were observed thus indicated the inorganic compound was embedded in the Nafion matrix and did not leach out after washing treatment using acid and base solutions.

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