Comparative study of protonic conducting polymers incorporated in the oxygen electrode of the PEMFC

The kinetics of the reduction of oxygen at the surface of a platinum disc covered with thin layers of polymer has been studied in 0.5 M H 2SO 4 at ambient temperature in order to establish to what extent the polymer affects the reaction mechanism. Experiments were performed particularly to determine...

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Bibliographic Details
Published in:Journal of power sources 2005-09, Vol.149, p.66-71
Main Authors: Ayad, A., Bouet, J., Fauvarque, J.F.
Format: Article
Language:English
Subjects:
Applied sciences
Chemical Sciences
Energy
Energy. Thermal use of fuels
Equipments for energy generation and conversion: thermal, electrical, mechanical energy, etc
Exact sciences and technology
Fuel cells
Material chemistry
Oxygen electrode
PEMFC
Protonic conducting polymers
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Summary:The kinetics of the reduction of oxygen at the surface of a platinum disc covered with thin layers of polymer has been studied in 0.5 M H 2SO 4 at ambient temperature in order to establish to what extent the polymer affects the reaction mechanism. Experiments were performed particularly to determine the oxygen permeability D f C f (product of the diffusion coefficient and the oxygen concentration in the film) for Nafion ® and other polymers such as sulfonated polyimide (PIS), sulfonated polyetherketone (PEEKs) and non-sulfonated polybenzimidazole (PBI). The product D f C f depends on the nature of the polymer. Furthermore, how well the active layer works depends markedly on the amount of polymer it contains.
ISSN:0378-7753
1873-2755
DOI:10.1016/j.jpowsour.2005.02.044