Please use this identifier to cite or link to this item: http://hdl.handle.net/10216/106527
Author(s): Joana Pereira
Daniela Falcão
Vânia Oliveira
Alexandra Rodrigues Pinto
Title: Performance of a passive direct ethanol fuel cell
Issue Date: 2014
Abstract: Ethanol emerges as an attractive fuel since it is less toxic and has higher energy density than methanol and can be produced from biomass. Direct ethanol fuel cells (DEFCs) appear as a good choice for producing sustainable energy for portable applications. However, they are still far from attaining acceptable levels of power output, since their performance is affected by the slow electrochemical ethanol oxidation and water and ethanol crossover. In the present work, an experimental study on the performance of a passive DEFC is described. Tailored MEAs (membrane electrode assembly) with different catalyst loadings, anode diffusion layers and membranes were tested in order to select optimal working conditions at high ethanol concentrations and low ethanol crossover. The performance increased with an increase of membrane and anode diffusion layer thicknesses and anode catalyst loading. A maximum power density of 1.33 mW cm(-2), was obtained using a Nafion 117 membrane, 4 mg cm(-2) of Pt-Ru and 2 mg cm(-2) of Pt on the anode and cathode catalyst layers. ELAT as anode diffusion layer, carbon cloth as cathode diffusion layer and an ethanol concentration of 2 M. As far as the authors are aware this is the first work reporting an experimental optimization of passive DEFCs.
Subject: Ciências da engenharia e tecnologias
Engineering and technology
URI: http://hdl.handle.net/10216/106527
Document Type: Artigo em Revista Científica Internacional
Rights: restrictedAccess
Appears in Collections:FEUP - Artigo em Revista Científica Internacional

Files in This Item:
File Description SizeFormat 
105712.pdfArtigo Original Publicado510.94 kBAdobe PDF    Request a copy


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.