Regensburg 2025 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 32: Poster Session II
CPP 32.25: Poster
Donnerstag, 20. März 2025, 09:30–12:00, P3
Evaluating the Impact of Electrode Defects on PEMFC Performance and Durability — •Faezeh Mehdizadeh siahroudi1, Sebastian Prass1, and Andreas Bett2 — 1Division Hydrogen Technologies Department Fuel Cell Fraunhofer Institute for Solar Energy Systems ISE 79110 Freiburg, Germany — 2Fraunhofer-Institut für Solare Energiesysteme ISE
According to previous research, imperfect membrane electrode assembly (MEA) manufacturing processes can lead to catalyst layer and membrane defects. Therefore, we have decided to investigate the impact of missing areas in cathode and anode electrodes on the performance and durability of polymer electrolyte fuel cell (PEMFC). Missing areas with varied sizes and configurations are used to determine a threshold at which a missing area can be considered as a crucial defect that degrades MEA components. In our work, several in-situ electrochemical techniques were used, including polarization curves, linear sweep voltammetry (LSV), cyclic voltammetry (CV), and electrochemical impedance spectroscopy (EIS) experiments. The structural changes in the electrodes and the membrane are visualized through SEM cross-sectional imaging.
Keywords: PEMFC; Electrode Defects; MEA; Electrochemical techniques; Durability