Investigation of electrochemical double layers in solid oxide cells

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This interdisciplinary project aims to improve the qualitative and quantitative understanding of the fundamental processes in solid oxide electrochemical cells (SOCs) Ni-Yttria-stabilized Zirconia electrode. such as surface adsorption, bulk and surface diffusion, electrochemical reactions, electrostatic potential distribution.Using the framework of non-equilibrium thermodynamics, a model hierarchy for SOCs will be formulated. Special attention will be given to the non-equilibrium description of charged species interaction in the electrochemical double layers and to the derivation of thermodynamically consistent interfacial conditions.In close cooperation with the Czech project partner, the predictions of this model will be compared to experimental results. In order to obtain quantitative data from the model, it will be transformed into a numerical model using thermodynamically consistent discretization approaches. Numerical simulations shall include both the electrochemical processes under consideration and the approaches to obtain measured data, with emphasis on electrochemical impedance spectroscopy. This approach will allow for a direct comparison to experimental results, identification of physical model parameters, understanding of interplay of various interfacial phenomena and the identification of limiting processes in SOCs.