Journal of the Korean Electrochemical Society (전기화학회지)

The Korean Electrochemical Society (한국전기화학회)
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Composite Membrane Containing a Proton Conductive Oxide for Direct Methanol Fuel Cell

  • Published : 2008.02.28
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Abstract

The composite membrane for direct methanol fuel cell (DMFC) was developed using $H_3O^+-{\beta}"-Al_2O_3$ powder and perfluorosulfonylfluroride copolymer (Nafion) resin. The perfluorosulfonylfluroride copolymer (Nafion) resin was mixed with $H_3O^+-{\beta}"-Al_2O_3$ powder and it was made to sheet form by hot pressing. The electrodes were prepared with 60 wt% PtRu/C and 60wt% Pt/C catalysts for anode and cathode, respectively. The morphology and the chemical composition of the composite membrane have been investigated by using SEM and EDXA, respectively. The composite membrane and $H_3O^+-{\beta}"-Al_2O_3$ were analyzed by using FT-IR and XRD. The methanol permeability of the composite membranes was also measured by gas chromatography (GC). The performance of the MEA containing the composite membrane (2wt% $H_3O^+-{\beta}"-Al_2O_3$) was higher than that of normal pure Nafion membrane at high operating temperature (e.g. $110^{\circ}C$), due to the homogenous distribution of $H_3O^+-{\beta}"-Al_2O_3$, which decreased the methanol permeability through the membrane and enhanced the water contents in the composite membrane.

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References

  1. O. Savadogo, "Emerging membranes for electrochemical systems: (I) solid polymer electrolyte membrane for fuel cell systems", J. New Mat. for Electrochem. Systems, 1, 47 (1998)
  2. J.-S. Jiang, D. B. Greenberg, and J. R. Fried, "Preparation of a Nafion composite membrane using a porous Teflon support", J. Membrane Science, 132, 273 (1997) https://doi.org/10.1016/S0376-7388(97)00067-7
  3. K. M. Nouel and P. S. Fedkiw, "$Nafion{\circledR}-based$ composite polymer electrolyte membrane", Electrochimica Acta, 43, 2381 (1998) https://doi.org/10.1016/S0013-4686(97)10151-7
  4. K. A. Mauritz I. D. Stefanithis, S. V. Davis, R.W. Scheetz, R. K. Pope, G.L. Wilkes, and H.H. Huang, "Microstructural evolution of a silicon oxide phase in a perfluorosulfonic acid inomer by an in situ sol-gel reaction", J. Appl. Polymer Sci., 55, 181 (1995) https://doi.org/10.1002/app.1995.070550120
  5. D. H. Jung, S. Y. Cho, D. H. Peck, D. R. Shin, and J. S. Kim, "Performance evaluation of a Nafion/silicon oxide hybrid membrane for direct methanol fuel cell", J. Power Sources, 106, 173 (2002) https://doi.org/10.1016/S0378-7753(01)01053-9
  6. K. A. Mauritz, "Organic-inorganic hybrid materials: perfluorinated ionomers as sol-gel polymerization templates for inorganic alkoxides", Materials Science and Engineering C, 6, 121 (1998) https://doi.org/10.1016/S0928-4931(98)00042-3
  7. P. L. Shao, K. A. Mauritz, and R. B. Moore, "Perfluorosulfonate ionomer/SiO2-TiO2 nanocomposites via polymer-in situ sol-gel chemistry: sequential alkoxide procedure", Chem. Mater., 7, 192 (1995) https://doi.org/10.1021/cm00049a029
  8. G. Pourcelly and C. Gavach, "Perfluorinated membrane" in Proton conductors (solids, membranes and gels-materials and devices), 294-310, ed., P. Colomban, Cambridge Univ. Press (1992)
  9. H. Ikawa, "Proton-containing ${\beta}-\;and\;{\beta}$"-alumina structure type compounds" in Proton conductors (solids, membranes and gels-materials and devices), 190-209, ed., P. Colomban, Cambridge Univ. Press (1992)
  10. S. Chandra, "Solid state proton conductors and their applications" in Handbook of solid state batteries & capacitors, 579-600, ed., M.Z.A. Munshi, World Scientific (1995)
  11. Ph. Colomban, G. Lucazeau, R. Mercier, and A. Novak, "Vibrational spectra and structure of $H^+(H_2O)_n.{\beta}-alumina$", J. Chemical Phys., 67, 5244 (1977) https://doi.org/10.1063/1.434701
  12. C. S. Kim, Y. G. Chun, D.H. Peck, and D. R. Shin, "A novel process to fabricate membrane electrode assemblies for proton exchange membrane fuel cells", Int. J. Hydrogen Energy, 23, 1045 (1998) https://doi.org/10.1016/S0360-3199(98)00021-4
  13. D. H. Jung, C. H. Lee, C. S. Kim, and D. R. Shin, "Performance of a direct methanol polymer electrolyte fuel cell", J. Power Sources, 71, 169 (1998) https://doi.org/10.1016/S0378-7753(97)02793-6