An approximate solution for a pseudocapacitor

被引:16
作者
Subramanian, VR
Devan, S
White, RE [1 ]
机构
[1] Univ S Carolina, Swearingen Engn Ctr, Ctr Electrochem Engn, Dept Chem Engn, Columbia, SC 29208 USA
[2] Tennessee Technol Univ, Dept Chem Engn, Cookeville, TN 38505 USA
关键词
capacitors; polynomial approximation; analytical solution; porous electrode; transient;
D O I
10.1016/j.jpowsour.2004.03.069
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
Transient analytical solutions are presented for the overpotential and the voltage for a porous electrode that includes both double-layer charging and a faradaic reaction. In addition, a simplified dynamic model is developed for the same process based on a second order, three-parameter polynomial approximate model. The effects of the parameters such as dimensionless exchange current density, conductivity ratio and applied current density on the voltage and overpotential distribution are presented. Also, using the exact transient solution an expression for the dimensionless interfacial current density is derived and the effects of the parameters mentioned above are presented. (C) 2004 Elsevier B.V. All rights reserved.
引用
收藏
页码:361 / 367
页数:7
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