Calculation of conductivity and polarization resistance of composite SOFC electrodes from random resistor networks

Journal Article · Sat Apr 01 00:00:00 EST 1995 · Journal of the Electrochemical Society

DOI:https://doi.org/10.1149/1.2044179· OSTI ID:64779

Sunde, S ^[1]

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1. SINTEF Materials Technology, Trondheim (Norway)

A model for total conductivity and polarization resistance of composite electrodes in solid oxide fuel cells is proposed. The model is based on numerically solving Kirchoff`s current law for the resistor network resulting from scattering predetermined fractions of electrode and electrolyte particles at random on the sites of a three-dimensional cubic lattice. The model predicts an almost abrupt rise in total conductivity at an electrode-particle volume-fraction of 0.3, and a polarization resistance with a relatively broad minimum close to this percolation threshold, in good agreement with experimental results.

• Sponsoring Organization: USDOE
• OSTI ID: 64779
• Journal Information: Journal of the Electrochemical Society, Vol. 142, Issue 4; Other Information: PBD: Apr 1995
• Country of Publication: United States
• Language: English

Related Subjects

30 DIRECT ENERGY CONVERSION
SOLID ELECTROLYTE FUEL CELLS
ELECTRODES
ELECTRICAL PROPERTIES
ELECTRIC CONDUCTIVITY
MATHEMATICAL MODELS
COMPOSITE MATERIALS
NICKEL
YTTRIUM OXIDES
ZIRCONIUM OXIDES