Standard Article

Interconnects

Fuel Cell Technology and Applications

Solid oxide fuel cells and systems (SOFC)

Materials

  1. K. Hilpert,
  2. W. J. Quadakkers,
  3. L. Singheiser

Published Online: 15 DEC 2010

DOI: 10.1002/9780470974001.f308084

Handbook of Fuel Cells

Handbook of Fuel Cells

How to Cite

Hilpert, K., Quadakkers, W. J. and Singheiser, L. 2010. Interconnects. Handbook of Fuel Cells. .

Author Information

  1. Institut für Werkstoffe und Verfahren der Energietechnik (IWV-2), Jülich, Germany

Publication History

  1. Published Online: 15 DEC 2010

Abstract

The interconnect connects the anode side of one single cell with the cathode side of the adjacent single cell, thus preventing the fuel and oxidant gasses from mixing. Ceramic and metallic interconnects are the most widely used concepts. The ceramic interconnect materials used are LaCrO3 base perovskites doped with Sr, Ca, or Mg and other metals in order to obtain sufficient electrical conductivity, to modify the thermal expansion, and to improve the sinterability. They are used for tubular cell configurations as well as for the monolithic and planar concepts. Ceramic interconnect materials have shown excellent long-term behavior for the tubular cells. There is a general trend towards using metallic interconnects in planar cells due to their relatively low costs, easy working potential, as well as high electrical and thermal conductivity. Most developments concentrate on Cr-based alloys or high-Cr ferrites depending on the cell design.

Keywords:

  • LaCrO3 base perovskites;
  • oxygen vacancies;
  • diffusion;
  • chemical stability;
  • chromium alloys;
  • ferritic steels;
  • oxidation rates;
  • oxide conductivity