Chemical stability of glass seal interfaces in intermediate temperature solid oxide fuel cells

  • Zhenguo Yang
  • Guanguang Xia
  • Kerry D. Meinhardt
  • K. Scott Weil
  • Jeff W. Stevenson
Fuel Cells: Materials, Processing And Manufacturing Technologies


In intermediate temperature planar solid oxide fuel cell (SOFC) stacks, the interconnect, which is typically made from cost-effective, oxidation-resistant, high-temperature alloys, is typically sealed to the ceramic positive electrode-electrolyte-negative electrode (PEN) by a sealing glass. To maintain the structural stability and minimize the degradation of stack performance, the sealing glass has to be chemically compatible with the PEN and alloy interconnects. In the present study, the chemical compatibility of a barium-calcium-aluminosilicate (BCAS) based glass-ceramic (specifically developed as a sealant in SOFC stacks) with a number of selected oxidation resistant high temperature alloys (and the yttria-stabilized zirconia electrolyte) was evaluated. This paper reports the results of that study, with a particular focus on Crofer22 APU, a new ferritic stainless steel that was developed specifically for SOFC interconnect applications.


ferritic stainless steels interconnect sealing glass solid oxide fuel cell 


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  1. 1.
    B.C.H. Steele and A. Heinzel: “Materials for Fuel Cell Technologies,” Nature, 2001, 414, pp. 345–52.PubMedCrossRefADSGoogle Scholar
  2. 2.
    N.Q. Mihn: “Ceramic Fuel Cells,” J. Am. Ceram. Soc., 1994, 76, pp. 563–88.Google Scholar
  3. 3.
    K. Huang, P.Y. Hou, and J.B. Goodenough: “Characterization of Iron-Based Alloy Interconnects for Reduced Temperature Solid Oxide Fuel Cells,” Solid State Ionics, 2000, 129, pp. 237–50.CrossRefGoogle Scholar
  4. 4.
    W.J. Quadakkers, T. Malkow, J. Piron-Abellan, U. Flesch, V. Shemet, and L. Singheiser, in Proceedings of the 4th European Solid Oxide Fuel Cell Forum, Vol 2., A. McEvoy, ed., European SOFC Forum, Switzerland, 2000, pp. 827–36.Google Scholar
  5. 5.
    J. Piron-Abellan, V. Shemet, F. Tietz, L. Singheiser, and W.J. Quadakkers, in Proceedings of the 7th International Symposium on Solid Oxide Fuel Cells, Vol. 2001-16, H. Yokokawa and S.C. Singhal, ed., The Electrochemical Proceedings Series, Pennington, NJ, 2001, pp. 811–19.Google Scholar
  6. 6.
    S.P.S. Badwal, R. Bolden, and K. Foger, in Proceedings of the 3rd European Solid Oxide Fuel Cell Forum, Vol. 1, Ph. Stevens, ed., the European SOFC Forum, Switzerland, 1998, pp. 105–14.Google Scholar
  7. 7.
    T. Brylewski, M. Nanko, T. Maruyama, and K. Przybylski: “Application of Fe-16Cr Ferritic Alloy to Interconnector for a Solid Oxide Fuel Cell,” Solid State Ionics, 2001, 143, pp. 131–50.CrossRefGoogle Scholar
  8. 8.
    Z.G. Yang, K.S. Weil, D.M. Paxton, and J. W. Stevenson: “Selection and Evaluation of Heat Resistant Alloys for Solid Oxide Fuel Cell Interconnect Applications,” J. Electrochem. Soc., 2003, 150, pp. 1188–1201.CrossRefGoogle Scholar
  9. 9.
    P. Kofstad, Nonstoichometry, Diffusion and Electrical Conductivity in Binary Metal Oxides, Wiley-Interscience, New York, 1972.Google Scholar
  10. 10.
    P. Kofstad and R. Bredesen: “High Temperature Corrosion in SOFC Environments,” Solid State Ionics, 1992, 52, pp. 69–75.CrossRefGoogle Scholar
  11. 11.
    K.D. Meinhardt, J.D. Vienna, T.R. Armstrong, and L.R. Peterson: “Glass-Ceramic Material and Method of Making,” U.S. Patent, No. 6,430,966, 2001.Google Scholar
  12. 12.
    Z. Yang, K.D. Meinhardt, and J.W. Stevenson: Chemical Compatibility of Barium-Calcium-Aluminosilicate-Based Sealing Glasses With Ferritic Stainless Steel Interconnects in SOFCs,” J. Electrochem. Soc., 2003, 150, pp. A1095–1101.CrossRefGoogle Scholar
  13. 13.
    Z. Yang, J.W. Stevenson, and K.D. Meinhardt: “Chemical Interactions of Barium-Calcium-Aluminosilicate-Based Sealing Glasses With Oxidation Resistant Alloys,” Solid State Ionics, 2003, 160, pp. 213–25.CrossRefGoogle Scholar
  14. 14.
    W.J. Quadadakkers, V. Shemet, and L. Lorenz: “Materials Used at High Temperatures for a Bipolar Plate of a Fuel Cell,” U.S. Patent, No. 2003059335, 2003.Google Scholar
  15. 15.
    C.W.F.T. Pistorius and M.C. Pistorius: “Lattice Constants and Thermal-Expansion Properties of the Chromates and Selenates of Lead, Strontium and Barium” Z. Krist, 1962, 117, pp. 259–72.CrossRefGoogle Scholar
  16. 16.
    Y. Matsuzaki and I. Yasuda: “Dependence of SOFC Cathode Degradation by Chromium-Containing Alloy of Compositions of Electrodes and Electrolytes,” J. Electrochem. Soc., 2001, 148, pp. A126–31.CrossRefGoogle Scholar
  17. 17.
    K. Hilpert, D. Das, M. Miller, D.H. Peck, and R. Weib: “Chromium Vapor Species over Solid Oxide Fuel Cell Interconnect Materials and Their Potential for Degradation Processes,” J. Electrochem. Soc., 1996, 143, pp. 3642–47.CrossRefGoogle Scholar
  18. 18.
    R. Weib, D. Peck, M. Miller, and K. Hillert: “Volatility of Chromium from Interconnect Material” in Proceedings of the 17th Riso International Symposium on Materials: High Temperature Electrochemistry: Ceramics and Metals, F.W. Poulsen, N. Bonanos, S. Linderoth, M. Mogensen, and B. Zachau-Christianen, ed., Denmark, 1996, pp. 479–84.Google Scholar
  19. 19.
    Z. Yang, M.S. Walker, J. Hardy, G. Xia, and J.W. Stevenson: “Structure and Electrical Conductivity of Thermally Grown Scales on Ferritic Fe-Cr-Mn Steel for SOFC Interconnect Applications,” submitted to the Journal of Electrochemical Society, 2003.Google Scholar

Copyright information

© ASM International 2004

Authors and Affiliations

  • Zhenguo Yang
    • 1
  • Guanguang Xia
    • 1
  • Kerry D. Meinhardt
    • 1
  • K. Scott Weil
    • 1
  • Jeff W. Stevenson
    • 1
  1. 1.Pacific Northwest National LaboratoryRichland

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