Determination of Ionic and Electronic Resistivities in Carbon/Polyelectrolyte Fuel-Cell Composite Electrodes
- 1 January 2002
- journal article
- Published by The Electrochemical Society in Journal of the Electrochemical Society
- Vol. 149 (12), A1541-A1546
- https://doi.org/10.1149/1.1516771
Abstract
Rational design of electrode materials for polymer electrolyte fuel cells requires a knowledge of how changes in material composition affect basic physical characteristics such as charge-transport properties. We present a simple method by which the electronic resistance of a thin layer of carbon/Pt/Nafion fuel-cell electrode composite material may be measured by dc polarization and then combined with ac impedance measurements to compute the ionic resistance of the layer. Further support of this technique is derived from an ac impedance test designed to simultaneously express both the measured electronic and the computed ionic resistance. We also demonstrate the use of the technique in a composition-dependence study, namely, examination of the effect of glycerol on the ionic and electronic resistances in a thin catalyst layer. © 2002 The Electrochemical Society. All rights reserved.Keywords
This publication has 15 references indexed in Scilit:
- Transport phenomena in polymeric membrane fuel cellsChemical Engineering Science, 2001
- Modelling of polymer electrolyte membrane fuel cells with variable degrees of water floodingJournal of Power Sources, 2000
- Development and application of a generalised steady-state electrochemical model for a PEM fuel cellJournal of Power Sources, 2000
- Mathematical model of the PEMFCJournal of Applied Electrochemistry, 2000
- Characterization of Ionic Conductivity Profiles within Proton Exchange Membrane Fuel Cell Gas Diffusion Electrodes by Impedance SpectroscopyElectrochemical and Solid-State Letters, 1999
- Measurements of proton conductivity in the active layer of PEM fuel cell gas diffusion electrodesElectrochimica Acta, 1998
- Phenomenological Theory of Electro‐osmotic Effect and Water Management in Polymer Electrolyte Proton‐Conducting MembranesJournal of the Electrochemical Society, 1998
- Modeling electrochemical performance in large scale proton exchange membrane fuel cell stacksJournal of Power Sources, 1998
- Low platinum loading electrodes for polymer electrolyte fuel cells fabricated using thermoplastic ionomersElectrochimica Acta, 1995
- Modeling and Experimental Diagnostics in Polymer Electrolyte Fuel CellsJournal of the Electrochemical Society, 1993