Percolation theory to predict effective properties of solid oxide fuel-cell composite electrodes

被引：189

作者：

Chen, Daifen ^{[2
,3
]}

Lin, Zijing ^{[2
,3
]}

Zhu, Huayang ^{[1
]}

Kee, Robert J. ^{[1
]}

机构：

[1] Colorado Sch Mines, Div Engn, Golden, CO 80401 USA

[2] Univ Sci & Technol China, Dept Phys, Anhua 230026, Peoples R China

[3] Univ Sci & Technol China, Hefei Natl Lab Phys Sci Microscale, Anhua 230026, Peoples R China

来源：

JOURNAL OF POWER SOURCES | 2009年 / 191卷 / 02期

基金：

美国国家科学基金会;

关键词：

Percolation theory; SOFC; Effective conductivity; Effective three-phase boundary length; NI-YSZ CERMET; COORDINATION-NUMBER; SOFC; MICROSTRUCTURE; CONDUCTIVITY; POLARIZATION; PERFORMANCE; CATHODES; MIXTURE; MODEL;

D O I：

10.1016/j.jpowsour.2009.02.051

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

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.

引用

页码：240 / 252

页数：13

共 33 条

[1] Geometrical modeling of microstructure of solid oxide fuel cell composite electrodes [J].