Résumé

This study utilizes the Electrochemical Impedance Spectroscopy (EIS) and the Distribution of Relaxation Times (DRT) to analyse the aging of Proton Exchange Membrane Fuel Cells (PEMFC). It aims to understand the underlying degradation mechanisms to enhance the efficiency and durability of PEMFC in heavy-duty vehicle applications. The DRT method applied on an aging stack dataset provides in-depth insights into specific degradation processes, such as the gas diffusion layer efficiency (GDL) and catalyst corrosion, through detailed impedance spectra analysis. Preliminary results indicate that DRT has the potential to improve ageing models. Future research will focus on applying this method to additional experimental datasets, while considering various operational conditions that impact degradation.