Special Issue "Polymer Electrolyte Membrane (PEM) Fuel Cells"

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A special issue of Applied Sciences (ISSN 2076-3417).

Deadline for manuscript submissions: closed (31 October 2013)

Special Issue Editor

Guest Editor
Prof. Dr. Felipe Rosa (Website)

Department of Energy Engineering, School of Engineering, University of Seville, Avenida Camino de los Descubrimientos, 41092 Seville, Spain
Interests: integration of renewable energies and hydrogen production; hydrogen as energy vector; fuel cells; reformer for hydrogen production; concentrated solar energy; use of solar energy for cooling purposes

Special Issue Information

Submission

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Keywords

  • PEM testing
  • PEM modeling
  • PEM applications
  • PEM poisoning
  • PEM High temperature
  • PEM standards
  • PEM materials

Published Papers (1 paper)

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Research

Open AccessArticle Chemical Surface, Thermal and Electrical Characterization of Nafion Membranes Doped with IL-Cations
Appl. Sci. 2014, 4(2), 195-206; doi:10.3390/app4020195
Received: 31 October 2013 / Revised: 10 March 2014 / Accepted: 17 April 2014 / Published: 29 April 2014
PDF Full-text (1809 KB) | HTML Full-text | XML Full-text
Abstract
Surface and bulk changes in a Nafion membrane as a result of IL-cation doping (1-butyl-3-methylimidazolium tetrafluoroborate or BMIM+BF4 and phenyltrimethylammonium chloride or TMPA+Cl) were studied by X-ray photoelectron spectroscopy (XPS), contact angle, differential scanning calorimetry [...] Read more.
Surface and bulk changes in a Nafion membrane as a result of IL-cation doping (1-butyl-3-methylimidazolium tetrafluoroborate or BMIM+BF4 and phenyltrimethylammonium chloride or TMPA+Cl) were studied by X-ray photoelectron spectroscopy (XPS), contact angle, differential scanning calorimetry (DSC) and impedance spectroscopy (IS) measurements performed with dry samples after 24 h in contact with the IL-cations BMIM+ and TMPA+. IL-cations were selected due to their similar molecular weight and molar volume but different shape, which could facilitate/obstruct the cation incorporation in the Nafion membrane structure by proton/cation exchange mechanism. The surface coverage of the Nafion membrane by the IL-cations was confirmed by XPS analysis and contact angle, while the results obtained by the other two techniques (DSC and IS) seem to indicate differences in thermal and electrical behaviour depending on the doping-cation, being less resistive the Nafion/BMIM+ membrane. For that reason, determination of the ion transport number was obtained for this membrane by measuring the membrane or concentration potential with the samples in contact with HCl solutions at different concentrations. The comparison of these results with those obtained for the original Nafion membrane provides information on the effect of IL-cation BMIM+ on the transport of H+ across wet Nafion/BMIM+ doped membranes. Full article
(This article belongs to the Special Issue Polymer Electrolyte Membrane (PEM) Fuel Cells)

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