Performance of a passive direct ethanol fuel cell

• Tipo: Artigo em Revista Científica Internacional
• Data: 2014

Autores

J. P. Pereira (Autor) FEUP; D. S. Falcão (Autor) FEUP; V. B. Oliveira (Autor) FEUP; A. M. F. R. Pinto (Autor) FEUP

Revista

Título: Journal of Power Sources

Vol. 256

Páginas: 14-19

ISSN: 0378-7753

Editora: Elsevier

Indexação

ISI Web of Knowledge - 30 Citações

ISI Web of Science

Scopus - 48 Citações

INSPEC

Classificação Científica

FOS: Ciências da engenharia e tecnologias

Outras Informações

ID Authenticus: P-009-49T

DOI: 10.1016/j.jpowsour.2013.12.036

Abstract (EN): 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.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 6