Next Article in Journal
Magnetic and Structural Properties of Barium Hexaferrite BaFe12O19 from Various Growth Techniques
Next Article in Special Issue
Probing Transition-Metal Silicides as PGM-Free Catalysts for Hydrogen Oxidation and Evolution in Acidic Medium
Previous Article in Journal
A Constitutive Model for Soft Clays Incorporating Elastic and Plastic Cross-Anisotropy
Previous Article in Special Issue
Carbon-Supported Pd and PdFe Alloy Catalysts for Direct Methanol Fuel Cell Cathodes
Article Menu
Issue 6 (June) cover image

Export Article

Open AccessFeature PaperArticle
Materials 2017, 10(6), 576; doi:10.3390/ma10060576

Transport in Proton Exchange Membranes for Fuel Cell Applications—A Systematic Non-Equilibrium Approach

Chemical Engineering, Delft University of Technology, 2629 HZ Delft, The Netherlands
*
Author to whom correspondence should be addressed.
Academic Editor: Haolin Tang
Received: 20 March 2017 / Revised: 15 May 2017 / Accepted: 19 May 2017 / Published: 25 May 2017
(This article belongs to the Special Issue Advanced Materials in Polymer Electrolyte Fuel Cells)
View Full-Text   |   Download PDF [8180 KB, uploaded 25 May 2017]   |  

Abstract

We hypothesize that the properties of proton-exchange membranes for fuel cell applications cannot be described unambiguously unless interface effects are taken into account. In order to prove this, we first develop a thermodynamically consistent description of the transport properties in the membranes, both for a homogeneous membrane and for a homogeneous membrane with two surface layers in contact with the electrodes or holder material. For each subsystem, homogeneous membrane, and the two surface layers, we limit ourselves to four parameters as the system as a whole is considered to be isothermal. We subsequently analyze the experimental results on some standard membranes that have appeared in the literature and analyze these using the two different descriptions. This analysis yields relatively well-defined values for the homogeneous membrane parameters and estimates for those of the surface layers and hence supports our hypothesis. As demonstrated, the method used here allows for a critical evaluation of the literature values. Moreover, it allows optimization of stacked transport systems such as proton-exchange membrane fuel cell units where interfacial layers, such as that between the catalyst and membrane, are taken into account systematically. View Full-Text
Keywords: non-equilibrium; interfacial effects; transport properties; coupling effects; transport coefficient matrix; PEM fuel cell; proton conductivity; water permeability; hydrogen permeability; diffusivity; electro-osmotic drag non-equilibrium; interfacial effects; transport properties; coupling effects; transport coefficient matrix; PEM fuel cell; proton conductivity; water permeability; hydrogen permeability; diffusivity; electro-osmotic drag
Figures

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

Scifeed alert for new publications

Never miss any articles matching your research from any publisher
  • Get alerts for new papers matching your research
  • Find out the new papers from selected authors
  • Updated daily for 49'000+ journals and 6000+ publishers
  • Define your Scifeed now

SciFeed Share & Cite This Article

MDPI and ACS Style

Rangel-Cárdenas, A.L.; Koper, G.J.M. Transport in Proton Exchange Membranes for Fuel Cell Applications—A Systematic Non-Equilibrium Approach. Materials 2017, 10, 576.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Materials EISSN 1996-1944 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top