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Structure and Electrochemical Properties of the Cathode/Electrolyte Interface in the Planar SOFC

Struktur und elektrochemische Eigenschaften der Grenzfläche Kathode/Elektrolyt in der planaren Hochtemperatur-Brennstoffzelle
 
: Kuznecov, M.; Otschik, P.; Eichler, K.; Schaffrath, W.

Berichte der Bunsengesellschaft für Physikalische Chemie 102 (1998), No.10, pp.1410-1417
ISSN: 0005-9021
English
Journal Article
Fraunhofer IKTS ()
Electrochemical Impedance; electrochemistry; LSM-cathode; SOFC

Abstract
The electrochemical behaviour of the cathode/electrolyte interface which is formed between screen printed La0.8Sr0.2MnO3-cathode and ZrO2+8%Y2O3 electrolyte was investigated. The impedance of the cathode/electrolyte interface was calculated as a function of (I) the oxygen exchange velocity between cathode material and atmosphere, (II) interface microstructure and (III) the oxygen vacancies diffusion coefficient. A very good agreement between calculated and measured impedancee spectra was achieved. The influence of the porosity of the cathode on the impedance is discussed.

: http://publica.fraunhofer.de/documents/PX-35122.html