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Analysis of Solid Oxide Fuel Cell LSM-YSZ Composite Cathodes With Varying Starting Powder Sizes

[+] Author Affiliations
William M. Harris, George J. Nelson, Jeffrey J. Lombardo, Alex P. Cocco, John R. Izzo, Jr., Wilson K. S. Chiu

University of Connecticut, Storrs, CT

Pietro Tanasini, Jan Van herle, Christos Comninellis

École Polytechnique Fédérale de Lausanne, Lausanne, Switzerland

Joy C. Andrews, Yijin Liu, Piero Pianetta

SLAC National Accelerator Laboratory, Menlo Park, CA

Yong S. Chu

Brookhaven National Laboratory, Upton, NY

Paper No. IMECE2011-64237, pp. 581-584; 4 pages
doi:10.1115/IMECE2011-64237
From:
  • ASME 2011 International Mechanical Engineering Congress and Exposition
  • Volume 4: Energy Systems Analysis, Thermodynamics and Sustainability; Combustion Science and Engineering; Nanoengineering for Energy, Parts A and B
  • Denver, Colorado, USA, November 11–17, 2011
  • Conference Sponsors: ASME
  • ISBN: 978-0-7918-5490-7
  • Copyright © 2011 by ASME

abstract

Solid oxide fuel cell cathodes have been examined using non-destructive x-ray nanotomography. The cathodes examined were a composite of strontium-doped lanthanum manganite (LSM) and yttria-stabilized zirconia (YSZ), with three different starting powder sizes of 0.3 μm, 0.5 μm, and 1 μm. Differential absorption contrast imaging was performed over the manganese K-edge (6539 eV) for the identification of the LSM, YSZ, and pore phases. The three phases were each segmented from reconstruction of the tomography data. Three dimensional volumes of the segmented phases were used to calculate structural characterization parameters of the sample including porosity, pore size distributions, and mean phase sizes. These parameters are reported and some correlations are drawn to the starting powder size.

Copyright © 2011 by ASME

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