Fulltext

Materials design for perovskite SOFC cathodes

Richter, Jörg ; Holtappels, Peter ; Graule, Thomas ; Nakamura, Tetsuro ; Gauckler, Ludwig

In: Monatshefte für Chemie - Chemical Monthly, 2009, vol. 140, no. 9, p. 985-999

Ajouter à la liste personnelle
    Titre
    • Materials design for perovskite SOFC cathodes
    Auteur
    • Richter, Jörg. Laboratory for High Performance Ceramics, Empa, Swiss Federal Laboratories for Materials Testing and Research, Ueberlandstrasse 129, 8600, Duebendorf, Switzerland
    • Holtappels, Peter. Laboratory for High Performance Ceramics, Empa, Swiss Federal Laboratories for Materials Testing and Research, Ueberlandstrasse 129, 8600, Duebendorf, Switzerland
    • Graule, Thomas. Laboratory for High Performance Ceramics, Empa, Swiss Federal Laboratories for Materials Testing and Research, Ueberlandstrasse 129, 8600, Duebendorf, Switzerland
    • Nakamura, Tetsuro. Department of Applied Chemistry, Faculty of Engineering, Kanagawa Institute of Technology, Atsugi, Japan
    • Gauckler, Ludwig. Department of Materials, ETH Zurich, Wolfgang Pauli-Strasse 10, 8093, Zurich, Switzerland
    Type de document
    • Postprint
    Langue
    • Anglais
    Publié dans
    • Monatshefte für Chemie - Chemical Monthly, 2009, vol. 140, no. 9, p. 985-999. Springer Vienna
    Autre version électronique
    Identifiant OAI-PMH
    • oai:doc.rero.ch:310193
    Summary
    Abstract: This article focuses on perovskite materials for application as cathode material in solid oxide fuel cells. In order to develop new promising materials it is helpful to classify already known perovskite materials according to their properties and to identify certain tendencies. Thereby, composition-dependent structural data and materials properties are considered. Structural data under consideration are the Goldschmidt tolerance factor, which describes the stability of perovskites with respect to other structures, and the critical radius and lattice free volume, which are used as geometrical measures of ionic conductivity. These calculations are based on the ionic radii of the constituent ions and their applicability is discussed. A potential map of perovskites as a tool to classify simple ABO3 perovskite materials according to their electrical conduction behavior is critically reviewed as a structured approach to the search for new cathode materials based on more complex perovskites with A and/or B-site substitutions. This article also covers the approaches used to influence electronic and the ionic conductivity. The advantage of mixed ionic electronic conductors in terms of the oxygen exchange reaction is addressed and their important properties, namely the oxygen-exchange coefficient and the oxygen diffusion coefficient, and their effect on the oxygen reduction reaction are presented. Graphical abstract