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Applied Sciences
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Polymer Electrolyte Membrane (PEM) Fuel Cells
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Polymer Electrolyte Membrane (PEM) Fuel Cells

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Energy Science and Technology".

Deadline for manuscript submissions: closed (31 October 2013) | Viewed by 7223

Special Issue Editor

Prof. Dr. Felipe Rosa

E-Mail Website
Guest Editor
Department of Energy Engineering, School of Engineering, University of Seville, 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

Manuscript Submission Information

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Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2400 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

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

1809 KiB  
Article
Chemical Surface, Thermal and Electrical Characterization of Nafion Membranes Doped with IL-Cations
by María Del Valle Martínez de Yuso, Ana Arango-Díaz, Shanti Bijani, Virgina Romero, Juana Benavente and Enrique Rodríguez-Castellón
Appl. Sci. 2014, 4(2), 195-206; https://doi.org/10.3390/app4020195 - 29 Apr 2014
Cited by 9 | Viewed by 6893
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 (DSC) [...] 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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