Journal of the Korean Institute of Electrical and Electronic Material Engineers (한국전기전자재료학회논문지)

The Korean Institute of Electrical and Electronic Material Engineers (한국전기전자재료학회)
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Property Optimization of Ni/CGO Cermet Anodes

Ni/CGO Cermet Anode의 특성 최적화

  • 최종혁 (고려대학교 공대 재료·금속공학부) ;
  • 김남진 (고려대학교 공대 재료·금속공학부) ;
  • 이덕열 (고려대학교 공대 재료·금속공학부)
  • Published : 1999.01.01
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Abstract

Ni/CGO cermets were fabricated as the anode for SOFC which uses CGO as the electrolyte. And their electrical conductivity, electrochemical reactivity, and thermal expansion coefficient were optimized through the variation of NiO/CGO particle size ration and their composition. The electrical conductivity of the cermet was increased abruptly at a certain Ni content and the percolation concentration was decreased with the decreasing particle size ratio. Anodic overpotential was also decreased with the decreasing particle size ratio. For a fixed ratio it showed a minimum value at 50 wt.%. Thermal expansion coefficient was increased monotonically with increasing Ni contents, however it did not depend on the size ratio. With three properties taken into account, the cermet of particle size ration of 0.03 and composition of 50 wt.% was judged to be optimal as the anode.

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References

  1. The 2nd International Fuel Cell Conference, Japan Development of Planar SOFC Technology in Australia S. P. S. Badwal;K. Foger
  2. Solid State Ionics v.83 Review Ceria-based Solid Electrolytes H. Inaba;H. Tagawa
  3. Solid State Ionics v.52 Electrical Properties of Ceria-based Oxides and Their Application to Solid Oxide Fuel Cell K. Eguchi;T. Setoguchi;T. Inoue;H. Arai
  4. Solid State Ionics v.86-88 Solid Oxide Fuel Cells Based on Ce(Gd)O₂-x Electrolytes K. Zheng;B. C. H. Steele;M. Sahibzada;I. S. Metcalfe
  5. Solid State Ionics v.86-88 Survey of Materials Selection for Ceramic Fuel Cells Ⅱ. Cathodes and Anodes B. C. H. Steele
  6. Fuel Cell Systems K. A. Murugesamoorthi;S. Srinivasan;A. J. Appleby;L. J. M. J. Blomen;M. N. Mugerwa
  7. J. of the Korean Ceramic Soc. v.34 A Study on the Synthesis of Gd-doped CeO₂and Sr-doped LaMnO₃Powders and Phase Stability in Their Interface S. H. Jung;N. J. Kim;D. Y. Lee
  8. Proceedings of the Fifth International Symposium on SOFC, The Electrochemical Society, Inc., USA v.97-40 Influence of Water Vapor on Electrochemical Oxidation of Hydrogen at the Ni/Zirconia Interface F. Z. Mohamedi-Boulenouar;J. Guindet;A. Hammou;U. Stimming;S. C. Singhal;H. Tagawa;W. Lehnert
  9. Solid State Ionics v.72 Characterization of Solid Oxide Fuel Cell Electrodes by Impedance Spectroscopy and Ⅰ-ⅤCharacteristics F. P. F. van Berkel;F. H. van Heuveln;J. P. P. Huijdmans
  10. J. Electrochem. Soc. v.134 no.9 Conductivity of Porous Ni/ZrO₂-Y₂O₃Cermets D. W. Dees;T. D. Claar;T. E. Easler;D. C. Fee;F. C. Mrazek
  11. J. of Applied Physics v.42 no.2 Influence of Particle Size on the Electrical Resistivity of Compacted Mixtures of Polymeric and Metallic Powders A. Malliaris;D. T. Turner
  12. Solid State Ionics v.83 Characterisation of LaNi₁-xCoxO₃as a Possible SOFC Cathode Material M. Hrovat;N. Katsarakis;K. Reichmann;S. Bernik;D. Kuscer;J. Holc