Selective anion exchange membranes for high coulombic efficiency vanadium redox flow batteries

被引：193

作者：

Chen, Dongyang ^{[1
]}

Hickner, Michael A. ^{[1
]}

Agar, Ertan ^{[2
]}

Kumbur, E. Caglan ^{[2
]}

机构：

[1] Penn State Univ, Dept Mat Sci & Engn, University Pk, PA 16802 USA

[2] Drexel Univ, Dept Mech Engn & Mech, Electrochem Energy Syst Lab, Philadelphia, PA 19104 USA

来源：

ELECTROCHEMISTRY COMMUNICATIONS | 2013年 / 26卷

关键词：

Anion exchange membrane; Capacity fade; Coulombic efficiency; Self-discharge; Vanadium redox flow battery;

D O I：

10.1016/j.elecom.2012.10.007

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

070208 [无线电物理];

摘要：

A quaternary ammonium functionalized poly(fluorenyl ether) anion exchange membrane (AEM) with extremely low VO2+ permeation was characterized for vanadium redox flow battery (VRFB) application. One hundred percent coulombic efficiency (CE) was achieved for the AEM-based VRFB at all the current densities tested. Comparatively, the CE of a N212 membrane-based VRFB was lower than 94% and varied with charge/discharge current density. At current densities lower than 60 mA cm(-2), the energy effiency of the AEM-based VRFB was higher than that of a device with N212. The cycling performance demonstrated that the AEM-based VRFB was free of capacity fade, which is a consequence of its low VO2+ permeability. These observations are of significant importance for flow batteries that operate intermittently or at moderate current densities. (C) 2012 Elsevier B.V. All rights reserved.

引用

页码：37 / 40

页数：4

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