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Journal Article

Electrochemistry of Crystalline Mixed Conductors: Concepts and Examples with SrTiO3

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Jamnik,  J.
Department Physical Chemistry of Solids (Joachim Maier), Max Planck Institute for Solid State Research, Max Planck Society;

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Citation

Jamnik, J. (2007). Electrochemistry of Crystalline Mixed Conductors: Concepts and Examples with SrTiO3. Chemical and Biochemical Engineering Quarterly, 21(1), 15-19.


Cite as: https://hdl.handle.net/21.11116/0000-000E-B71F-2
Abstract
The electrochemistry of mixed conductors is outlined. In particular the impact of grain boundaries on the transport perpendicular to the grain boundary plane is studied. Fe-doped SrTiO3 bicrystals were used as prototype mixed conductor. Experimental results obtained by optical spectroscopy (chemical diffusion) and electrochemical impedance spectroscopy (electrical transport) are analysed in terms of continuum models. A unified approach based on the use of '' chemical capacitors '' is briefly explained. For the description of grain boundary; the Schottky model acting on electronic and ionic charge carriers is used.