Browse by author
Lookup NU author(s): Jose Linares,
Emeritus Professor Keith Scott
Full text for this publication is not currently held within this repository. Alternative links are provided below where available.
Two methods of preparation of the membrane-electrode-assemblies based on polybenzimidazole membranes have been studied for high temperatures PEMFCs. One is called the "colloidal method" (using acetone as solvent), and the other is the "solution method" (using dimethylacetamide as solvent). Physical property studies (SEM micrographs and pore size distribution) and electrochemical analyses in half-cell (Electrochemical Impedance Spectroscopy, Polarization Curves for Oxygen Reduction and Cyclic Voltammetry) were carried out to characterise the structural and electrochemical behaviour of both methods. Finally, a cell performance investigation, using electrodes prepared by both methods was carried out at three different temperatures (125, 150, and 175 °C), in a single PEMFC setup. A better behaviour was obtained for the "solution method" at the two highest temperatures at intermediate current densities, whereas at 125 °C the best results were obtained with the "colloidal method" in all the current densities ranges. A discussion of the behaviours observed with the different characterisation techniques is made. © 2005 Elsevier B.V. All rights reserved.
Author(s): Lobato J, Rodrigo MA, Linares JJ, Scott K
Publication type: Article
Publication status: Published
Journal: Journal of Power Sources
ISSN (print): 0378-7753
ISSN (electronic): 1873-2755
Publisher: Elsevier SA
Altmetrics provided by Altmetric