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MM: Fachverband Metall- und Materialphysik
MM 27: Poster Session I
MM 27.14: Poster
Dienstag, 13. März 2018, 18:30–19:45, Poster E
Investigations on degradation effects in SOFC fuel cells — •Hanna-Friederike Poggemann1,2, René Gustus2, Georgia Sourkouni2, Christos Argirusis3, and Wolfgang Maus-Friedrichs1,2 — 1Institut für Energieforschung und Physikalische Technologien, TU Clausthal, Leibnizstr. 4, 38678 Clausthal-Zellerfeld, Germany — 2Clausthaler Zentrum für Materialtechnik, TU Clausthal, Leibnizstr. 4, 38678 Clausthal-Zellerfeld, Germany — 3School of Chemical Engineering, National Technical University of Athens, 9 Heroon Polytechniou St. Zographos Athens
Fuel cells are an important alternative to conventional processes of power generation. A fuel cell produces electrical power and heat directly from chemical energy. This avoids losses that can occur in conventional thermal and mechanical conversion processes during power generation. Nevertheless, the application of SOFCs for power generation is strongly limited by the life span and the robustness of the cells. In this regard, we investigated the degradation of SOFC fuel cells as a function of runtime and thermal as well as electrochemical strain. We used microscope and spectroscopic methods like Scanning Electron Microscopy (SEM) and Energy Dispersive X-Ray analysis (EDX) to investigate the microstructure and chemical composition of the anode and the cathode to get insight into changes in the elemental distribution and porosity of the fuel cells. In this context, we also examined the growth of the grains in the anode of the SOFC. Finally, we used Focused Ion Beam (FIB) tomography to gain further insight into the inner structure of the anode material.