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Promoting Electrochemical Performance of Fuel Cells by Heteropolyacid Incorporated Three-Dimensional Ordered Nafion Electrolyte

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A novel three-dimensional (3D) Cs2.5H0.5PW12O40-Nafion electrolyte materials are designed by impregnating Cs2.5H0.5PW12O40( m phosphotungstic acid:m Cesium carbonate = 50:7) into the 3D ordered Nafion matrixes, which are synthesized by monodisperse poly(methyl methacrylate) (PMMA) colloidal crystal template with subsequent removal of the organic template by solvent extraction. The results show that the reconstruction of the Nafion electrolyte to a 3D well-organized porous matrix form highly ordered proton transportation pathway, resulting in the improvement of the proton conductivity at high temperature and the Cs2.5H0.5PW12O40 proton carriers in the channels also play an assistant role in enhancing the proton conductivity. Furthermore, the spillover effect of the Cs2.5H0.5PW12O40 proton carriers effectively increases the electrochemical activity of the membrane electrode, lowers the interface impedance and improves the fuel cell performance.
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Keywords: 3D ORDERED NAFION MATRIX; CONDUCTIVITY; CS2.5H0.5PW12O40; ELECTROCHEMICAL ACTIVITY; INTERFACE IMPEDANCE; PEM FUEL CELL; PROTON EXCHANGE MEMBRANE

Document Type: Research Article

Publication date: November 1, 2013

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  • Science of Advanced Materials (SAM) is an interdisciplinary peer-reviewed journal consolidating research activities in all aspects of advanced materials in the fields of science, engineering and medicine into a single and unique reference source. SAM provides the means for materials scientists, chemists, physicists, biologists, engineers, ceramicists, metallurgists, theoreticians and technocrats to publish original research articles as reviews with author's photo and short biography, full research articles and communications of important new scientific and technological findings, encompassing the fundamental and applied research in all latest aspects of advanced materials.
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