Chapter 18. Control of Microstructure of NiO-SDC Composite Particles for Development of High Performance SOFC Anodes

  1. Narottam P. Bansal,
  2. Andrew Wereszczak and
  3. Edgar Lara-Curzio
  1. Koichi Kawahara1,
  2. Seiichi Suda1,
  3. Seiji Takahashi1,
  4. Mitsunobu Kawano2,
  5. Hiroyuki Yoshida2 and
  6. Toru Inagaki2

Published Online: 26 MAR 2008

DOI: 10.1002/9780470291337.ch18

Advances in Solid Oxide Fuel Cells II: Ceramic Engineering and Science Proceedings, Volume 27, Issue 4

Advances in Solid Oxide Fuel Cells II: Ceramic Engineering and Science Proceedings, Volume 27, Issue 4

How to Cite

Kawahara, K., Suda, S., Takahashi, S., Kawano, M., Yoshida, H. and Inagaki, T. (2006) Control of Microstructure of NiO-SDC Composite Particles for Development of High Performance SOFC Anodes, in Advances in Solid Oxide Fuel Cells II: Ceramic Engineering and Science Proceedings, Volume 27, Issue 4 (eds N. P. Bansal, A. Wereszczak and E. Lara-Curzio), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470291337.ch18

Author Information

  1. 1

    Japan Fine Ceramics Center 2-4-1 Mutsuno, Atsuta-ku Nagoya, 456-8587, Japan

  2. 2

    The Kansai Electric Power Co., Inc. 11-20 Nakoji, 3-chome Amagasaki 661-0974, Japan

Publication History

  1. Published Online: 26 MAR 2008
  2. Published Print: 1 JAN 2006

ISBN Information

Print ISBN: 9780470080542

Online ISBN: 9780470291337

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Keywords:

  • pyrolysis;
  • electrochemical;
  • microstructure;
  • monotonic;
  • tetrahydrate

Summary

Three different types of nickel oxide (NiO)-samarium doped ceria (SDC) composite particles were synthesized using the spray pyrolysis technique. The starting conditions were controlled to produce (1) capsule-type particles in which NiO is enveloped with SDC, (2) matrixtype in which SDC is finely dispersed within a matrix of NiO and (3) hollow-type, with a shell of less than 100nm in thickness. The capsule- and matrix-type composite particles were spherical, whereas the hollow-type particles were observed to be a mixture of hollow spheres and flake-like pieces which were probably broken particles. Measurements of the performance of single cells with La0.9Sr0.1Ga0.8Mg0.2O3-δ as the electrolyte, La0.6Sr0.4CoO3-δ as the cathode and each of the three particle types as the anode were made at 750°C. The cells fabricated from the matrix-type particles showed higher power density than those made from the capsule- and hollow-type particles. The better performance of the matrix-type composite was attributed to a lower ohmic loss. It is therefore considered that the matrix type of particle is likely to be best suited to the development of a fine and well-connected network structure which avoids aggregation of nickel phase during cell fabrication, resulting in a lower ohmic loss.