4.7 Article

Compilation of mechanical properties for the structural analysis of solid oxide fuel cell stacks. Constitutive materials of anode-supported cells

Journal

CERAMICS INTERNATIONAL
Volume 38, Issue 5, Pages 3907-3927

Publisher

ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2012.01.043

Keywords

Creep; Mechanical properties; Strength; Thermal expansion; Solid oxide fuel cell

Funding

  1. Swiss SOFC Consortium
  2. Swiss Federal Office of Energy (SFOE) [152210]
  3. Swisselectric Research

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The mechanical failure of one cell is sufficient to lead to the end of service of a solid oxide fuel cell (SOFC) stack. Therefore, there is growing interest in gaining knowledge on the mechanical properties of the cell materials for stress analysis. This study compiles available data from the literature on the mechanical properties of the most common materials used in intermediate-temperature anode-supported cells: nickel and yttria-stabilized zirconia (Ni-YSZ) anodes, YSZ electrolytes, yttria (YDC) or gadolinia-doped ceria (GDC) compatibility layers and lanthanum strontium manganite (LSM) or lanthanum strontium cobalt ferrite (LSCF) cathodes. The properties for the simulation of stresses, i.e. coefficient of thermal expansion (CTE), Young's modulus, Poisson's ratio, creep behaviour and strength are reported, with an emphasis on temperature and porosity dependence and the evolution upon aging or cycling when available. Measurements of our Ni(O)-YSZ anode material includes the CTE (oxidised and reduced state), Young's modulus and strength at room temperature (oxidised and reduced) and 1073 K (oxidised). (C) 2012 Elsevier Ltd and Techna Group S.r.l. All rights reserved.

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