Abstrakt
Title: Thermodynamic study of YSZ spectroscopy Authors: Petr Vágner*, Clemens Guhlke, Jürgen Fuhrmann Affiliations: Weierstrass Institute for Applied Analysis and Stochastics, Berlin, Germany; *Mathematical Institute, Faculty of Mathematics and Physics, Charles University, Prague, Czech Republic email: petr.vagner@wias-berlin.de Abstract: A new continuum model of yttria-stabilized zirconia (YSZ) has been developed in the framework non-equilibrium thermodynamics coupled to electrodynamics [1,2]. The model is based on a new free energy for YSZ which takes into account the oxygen ions properties, the elasticity of the YSZ-matrix lattice and their coupling.
In particular, the model is capable to spatially resolve the boundary layers in the vicinity of blocking electrode. We apply harmonic boundary conditions to investigate a model based understanding of YSZ impedance spectra.
The results are discussed in detail. [1] W. Dreyer, C.
Guhlke, R. Mueller, "Modeling of electrochemical double layers in thermodynamic non-equilibrium.
Phys. Chem.
Chem. Phys., 17:27176-27194, 2015. [2] S.
R. deGroot and P. Mazur, "Non-Equilibrium Thermodynamics" North Holland, Amsterdam, 1963.