The study presented in this paper aims to evaluate the performance degradation of Polybenzimidazole (PBI) based High Temperature PEM (HTPEM) fuel cells subjected to triangular load cycling ageing test, according to a methodology already used by the authors. A HTPEM Membrane Electrode Assembly (MEA) has been subjected to 125,000 triangular sweep cycle between Open Circuit Voltage (OCV) and 0.5 A/cm2 with 2 seconds of permanence at OCV at each cycle. In order to assess the cell performance, polarization curves, Electro Impedance Spectroscopy (EIS) and Cyclic Voltammetry (CV) have been recorded during the ageing tests.
