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

Abstract

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.

Keywords

ferritic stainless steels interconnect sealing glass solid oxide fuel cell 

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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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