Abstract
In this study, we propose a new experimental setup and methodology that can perform in-situ diagnostic of a solid oxide cell stack without interfering with its normal steady state operation. We establish a floating ground galvanodynamic electrochemical impedance spectroscopy measurement setup connected to a 6-cell short stack. The diagnostic setup is electrically connected in parallel to the electronic load of the stack, so that the respective AC and DC current signals overlap. We demonstrate that this methodology is effective in detecting degradation and assessing the state-of-health of a specific cell or stack without disrupting its operation.
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