A Method for Predicting the Tortuosity of Pore Phase in Solid Oxide Fuel Cells Electrode

被引：0
作者：
Kong, Wei [1 ]
Zhang, Qiang [1 ]
Gao, Xiang [1 ]
Zhang, Jiying [2 ]
Chen, Daifen [1 ]
Su, Shichuan [1 ]
机构：
[1] Jiangsu Univ Sci & Technol, Sch Energy & Power Engn, Zhenjiang 212003, Jiangsu, Peoples R China
[2] Jianghan Univ, Inst Interdisciplinary Res, Wuhan 430056, Hubei, Peoples R China
来源：
INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE | 2015年 / 10卷 / 07期
基金：
美国国家科学基金会;
关键词：
Solid oxide fuel cells; Electrode; Porous media; Tortuosity; Gas transport; The effective gas diffusion coefficient; ELECTROCHEMICAL PERFORMANCE; INTERMEDIATE TEMPERATURE; MICROSTRUCTURE; ANODE; TRANSPORT; SOFC; RECONSTRUCTION; POLARIZATION; SIMULATION; FLOW;
D O I：
暂无
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
A novel method is proposed to estimate the tortuosity of the pore phase in solid oxide fuel cells (SOFC) electrode fabricated by the conventional powder-processed technique. The electrode microstructure is reconstructed by a 3D cube packing model. Based on the reconstructed structure and the numerical simulation approach, the tortuosity of the pore phase is obtained. This approach not only overcomes the complexity, expensiveness and time consumption of the experimental method, but also is more accurate and efficient compared to 3D sphere packing model. The validity of this approach has been demonstrated by the good agreement with experiment data. The results conclusively justify that the tortuosity strongly depend on the porosity, which should not be treated as an adjustable or empirical parameter. This study provides an accurate and efficient approach for the prediction of the tortuosity.
引用
收藏
页码：5800 / 5811
页数：12
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