High-temperature PEM Fuel Cell Characterization: an Experimental Study Focused on Potential Degradation due to the Polarization Curve

High-Temperature Proton Exchange Membrane Fuel Cell constant current ageing tests highlighted that the characterizations used to monitor state of health single cells could be potentially degrading. An experimental campaign analyze potential degradation due polarization curves was carried out. More exactly, four methodologies generate a curve including Electrochemical Impedance Spectroscopies (EIS) were cycled 30 times. The tested based on commercial PBI Electrodes Assembly (MEA) with an active surface 45 cm 2 (BASF Celtec®-P 1100 type). Before first cycling test and after last one, complete characterizations, composed by voltammetry EIS, performed. results show one MEA has voltage which increased for methods obtain curve. This growth is linked decrease ohmic losses: in unexpected way, it considered as way improve break-in period. Similarly, monitoring CO emission (as corrosion been suspected involved at high voltage, i.e. low density) confirms electrodes during measurement