Electrochemical characterisation of a CFY-stack with planar electrolyte-supported solid oxide cells in rSOC operation

Electrochemical characterisation of a CFY-stack with planar electrolyte-supported solid oxide cells in rSOC operation

Electrochemical impedance spectroscopy (EIS) has been used for years to detect loss mechanisms in fuel cells at an early stage.



In addition to this classic analysis method by fitting the measurement results with equivalent circuit diagrams, more advanced methods such as "Distribution of relaxation times (DRT)" and "Total Harmonic Distortion (THD)" have recently made it possible to gain more detailed insights for improved predictions about the service life of fuel cells in use.



This application note in English shows high-frequency THD artefacts as a result of sensitive online monitoring of artificially induced fuel cell ageing processes.