Durability Test Results of a PEMFC Operated at Over-Nominal Temperature with Low Humidified Reactants
WASTERLAIN ; CANDUSSO ; HAREL ; FRANCOIS ; PERA ; HISSEL
Type de document
ARTICLE A COMITE DE LECTURE REPERTORIE DANS BDI (ACL)
Langue
anglais
Auteur
WASTERLAIN ; CANDUSSO ; HAREL ; FRANCOIS ; PERA ; HISSEL
Résumé / Abstract
A 3-cell PEMFC stack equipped with perfluorinated ionomer membranes is tested during 1000 hours in severe operating conditions. The fuel cell (FC) is fed by dry hydrogen / low humidified air and it is simultaneously operated at over-nominal temperature. During the long-term experiment, some polarization curves and electrochemical impedance spectra are recorded at regular time-spaced intervals for various stoichiometry rates. The objective is to characterize the degradation of FC performances with the aim to better understand the FC ageing mechanisms. Some response surfaces are plotted to display and analyze the stack voltage variations as a function of ageing time, static load current and gas utilization rates. Different points of the FC impedance spectra are also considered. The evolutions of their co-ordinates in the Nyquist plot can be monitored versus ageing time and for different gas utilization rates.
Source
Journal of Fuel Cell Science and Technology, num. 2, 8 p p.
Editeur
ASME