HYSYDAYS
1st World Congress of Young Scientists on Hydrogen Energy Systems
1st World Congress of Young Scientists on Hydrogen Energy Systems
ISBN Print: 1-56700-230-7
MULTIVARIATE OPTIMIZATION OF THE FABRICATION PROCEDURE OF POLYMER ELECTROLYTE FUEL CELL ELECTRODES
DOI: 10.1615/HYSYDAYS2005.560
pages 385-388
Résumé
Various procedures for the fabrication of membraneelectrode
assemblies (MEAs) for polymer electrolyte fuel cells
(PEFC) have been reported in the literature; all of these
procedures were optimised by studying the effects on PEFC
performances of fabrication parameters, experimenting the
effect of each variable with OVAT (one variable at a time)
experimental planes. Such a univariate experimental
approaches do not allow evaluating the effects of mutual
interactions between fabrication parameters and requiring large
number of experiments, with consequent waste of time and
materials. On the other hand, MEA’s preparation procedures
need to be frequently verified, due the continuing evolution of
the materials available and to maximise performances under
particularly demanding conditions, such as low temperature and
diffusive oxidant supply.
The experimental design statistical technique provides the maximum information about the system under study, with the minimum number of experiments but no description of its application to MEAs fabrication has yet been reported in the literature In this work, the experimental design technique was used to evaluate the effects of MEA's fabrication parameters, for use in low-temperature, hydrogen fuelled PEFC. The effects of the contents of Pt-carbon catalyst and Nafion ionomer in the catalyst layer, and Vulcan carbon black and Teflon in the diffusion layer, were studied by preparing MEAs whose composition was varied according to a fractional experimental design.
The MEAs obtained were experimented for the fabrication of an air-breathing, hydrogen fuelled PEFC operating at room temperature.
The experimental design statistical technique provides the maximum information about the system under study, with the minimum number of experiments but no description of its application to MEAs fabrication has yet been reported in the literature In this work, the experimental design technique was used to evaluate the effects of MEA's fabrication parameters, for use in low-temperature, hydrogen fuelled PEFC. The effects of the contents of Pt-carbon catalyst and Nafion ionomer in the catalyst layer, and Vulcan carbon black and Teflon in the diffusion layer, were studied by preparing MEAs whose composition was varied according to a fractional experimental design.
The MEAs obtained were experimented for the fabrication of an air-breathing, hydrogen fuelled PEFC operating at room temperature.
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