6. Y2O3-Stabilized ZrO2 Aerogels Prepared from an Epoxide Assisted Solgel Synthesis for Use in SOFC Composite Cathodes

  1. Narottam P. Bansal
  1. Christopher N. Chervin1,
  2. Hsiang Wei Chiu1,
  3. Susan M. Kauzlarich1,
  4. Brady J. Clapsaddle2,
  5. Robert S. Glass2 and
  6. Joe H. Satcher Jr.2

Published Online: 26 MAR 2008

DOI: 10.1002/9780470291245.ch6

Advances in Solid Oxide Fuel Cells: Ceramic Engineering and Science Proceedings, Volume 26, Number 4

Advances in Solid Oxide Fuel Cells: Ceramic Engineering and Science Proceedings, Volume 26, Number 4

How to Cite

Chervin, C. N., Chiu, H. W., Kauzlarich, S. M., Clapsaddle, B. J., Glass, R. S. and Satcher, J. H. (2005) Y2O3-Stabilized ZrO2 Aerogels Prepared from an Epoxide Assisted Solgel Synthesis for Use in SOFC Composite Cathodes, in Advances in Solid Oxide Fuel Cells: Ceramic Engineering and Science Proceedings, Volume 26, Number 4 (ed N. P. Bansal), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470291245.ch6

Author Information

  1. 1

    University of California, Davis One Shields Ave Davis, CA, 95616

  2. 2

    Lawrence Livermore National Laboratory 7000 East Ave Livermore, CA, 94550

Publication History

  1. Published Online: 26 MAR 2008
  2. Published Print: 1 JAN 2005

ISBN Information

Print ISBN: 9781574982343

Online ISBN: 9780470291245

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Keywords:

  • oxygen;
  • cathode;
  • hydrolysis;
  • homogeneous;
  • monolithic gel

Summary

The effect of Y2O3-stabilized ZrO2 (YSZ) particle size on composite YSZ – (La0.85Sr0.15)0.98MnO3 (LSM) cathode microstructure and performance was examined. Two nanocrystalline YSZ powders were compared with different particle size and surface areas; a commercial powder with ∼ 100 nm particles and 11 m2/g surface area and a synthesized YSZ powder with ∼10 nm particles and 124 m2/g surface area. The LSM phase of the composite was the same in both systems. Anode supported single cells were fabricated and the electrochemical performances measured. The cathode microstructures for the high surface area YSZ composites were examined as a function of sintering temperature and compared to the lower surface area YSZ composite cathode sintered at 1150°C. The larger surface area YSZ was prepared using a novel epoxide initiated sol-gel synthesis, followed by aerogel processing. The aerogels were characterized with TEM, SEM, BET surface area analysis, and powder XRD.