Journal
JOURNAL OF POWER SOURCES
Volume 191, Issue 2, Pages 240-252Publisher
ELSEVIER
DOI: 10.1016/j.jpowsour.2009.02.051
Keywords
Percolation theory; SOFC; Effective conductivity; Effective three-phase boundary length
Funding
- Chinese Academy of Sciences [KJCX1.YW.07]
- National High-Tech R&D Program of China [2007AA05Z156]
- National Science Foundation of China [10574114]
- US Office of Naval Research [N00014-05-1-0339]
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A micromodel based upon percolation theory is developed to predict effective properties in composite electrodes for solid oxide fuel-cell (SOFC) applications. The theory considers binary and multi-component mixtures of particles that are either ion or electron conductors. The model predicts effective ionic and electronic conductivities, three-phase boundary lengths, and hydraulic pore radii. The effective properties depend upon primary physical characteristics, including average particle-radii, volumetric packing densities, particle contact angles, and porosity. All results ate presented in nondimensional form, which provides considerable generality in their practical application. (C) 2009 Elsevier B.V. All rights reserved.
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