Solid oxide fuel cells offer great prospects for the sustainable clean and safe conversion of
various fuels into electrical energy. In this thesis the performance-determining loss
processes for the cell operation on reformate fuels are elucidated via electrochemical
impedance spectroscopy. Model-based analyses reveal the electrochemical fuel oxidation
mechanism the coupling of fuel gas transport and reforming chemistry and the impact of fuel
impurities on the degradation of each loss process.
