Jump to main content
Jump to site search

Issue 6, 2013
Previous Article Next Article

Epitaxial growth and enhanced conductivity of an IT-SOFC cathode based on a complex perovskite superstructure with six distinct cation sites

Author affiliations

Abstract

Epitaxial thin films of the 10 layer cubic perovskite superstructure Ba1.7Ca2.4Y0.9Fe5O13 were grown by pulsed laser deposition, retaining the six distinct cation sites found in the bulk material. Growth on single crystal strontium titanate (STO) (0 0 1) substrates changes the observed symmetry from orthorhombic to tetragonal and orients the layer stacking direction of the superstructure normal to the substrate plane. The material is a candidate cathode for solid oxide fuel cells (SOFCs) and in the intermediate temperature (IT) region at 600 °C we measure the in-plane AC conductivity of the thin film as 30 S cm−1, significantly enhanced over 3.5 S cm−1 found for the polycrystalline form. This is assigned to reduction of the grain boundary density and alignment of the planes predicted to have the highest electronic and ionic conductivities. High resolution electron microscopy measurements demonstrate the atomic site ordering producing the superstructure and reveal defects associated with stacking faults in the ordering sequence.

Graphical abstract: Epitaxial growth and enhanced conductivity of an IT-SOFC cathode based on a complex perovskite superstructure with six distinct cation sites

Back to tab navigation

Supplementary files

Publication details

The article was received on 07 Nov 2012, accepted on 01 Apr 2013 and first published on 03 Apr 2013


Article type: Edge Article
DOI: 10.1039/C3SC21931C
Citation: Chem. Sci., 2013,4, 2403-2412
  • Open access: Creative Commons BY license
  •   Request permissions

    Epitaxial growth and enhanced conductivity of an IT-SOFC cathode based on a complex perovskite superstructure with six distinct cation sites

    R. Sayers, N. L. O. Flack, J. Alaria, P. A. Chater, R. G. Palgrave, S. R. C. McMitchell, S. Romani, Q. M. Ramasse, T. J. Pennycook and M. J. Rosseinsky, Chem. Sci., 2013, 4, 2403
    DOI: 10.1039/C3SC21931C

    This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. Material from this article can be used in other publications provided that the correct acknowledgement is given with the reproduced material.

    Reproduced material should be attributed as follows:

    • For reproduction of material from NJC:
      [Original citation] - Published by The Royal Society of Chemistry (RSC) on behalf of the Centre National de la Recherche Scientifique (CNRS) and the RSC.
    • For reproduction of material from PCCP:
      [Original citation] - Published by the PCCP Owner Societies.
    • For reproduction of material from PPS:
      [Original citation] - Published by The Royal Society of Chemistry (RSC) on behalf of the European Society for Photobiology, the European Photochemistry Association, and RSC.
    • For reproduction of material from all other RSC journals:
      [Original citation] - Published by The Royal Society of Chemistry.

    Information about reproducing material from RSC articles with different licences is available on our Permission Requests page.

Search articles by author

Spotlight

Advertisements