Acceleration of the redox kinetics of VO2+/VO2 + and V3+/V2+ couples on carbon paper

被引：66
|
作者：
Wu, Xiong Wei [1 ]
Yamamura, Tomoo [2 ]
Ohta, Suguru [2 ]
Zhang, Qi Xiu [3 ]
Lv, Fu Cong [1 ]
Liu, Can Ming [4 ]
Shirasaki, Kenji [2 ]
Satoh, Isamu [2 ]
Shikama, Tatsuo [2 ]
Lu, Dan [1 ]
Liu, Su Qin [1 ]
机构：
[1] Cent S Univ, Sch Chem & Chem Engn, Changsha 410083, Hunan, Peoples R China
[2] Tohoku Univ, Inst Mat Res, Sendai, Miyagi 9808577, Japan
[3] Cent S Univ, Sch Met Sci & Engn, Changsha 410083, Hunan, Peoples R China
[4] Hunan Agr Univ, Changsha 410128, Hunan, Peoples R China
来源：
JOURNAL OF APPLIED ELECTROCHEMISTRY | 2011年 / 41卷 / 10期
基金：
美国国家科学基金会; 日本学术振兴会;
关键词：
Carbon paper; Vanadium redox reaction; Standard rate constants; Oxygen content; Vanadium redox-flow battery; GRAPHITE ELECTRODE MATERIALS; FLOW BATTERY APPLICATION; COMPOSITE ELECTRODES; ENERGY EFFICIENCY; CELL APPLICATIONS; FUEL-CELLS; PERFORMANCE; SYSTEM; IONS; DIOXOVANADIUM(V);
D O I：
10.1007/s10800-011-0343-7
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
The redox kinetics of VO2+/VO2 (+) and V3+/V2+ couples on a carbon paper (CP, HCP030 N, Shanghai Hesen, Ltd., China) electrode were investigated in terms of their standard rate constant (k (0)) and reaction mechanism. The values determined for k (0) for VO2+ -> VO2 (+) and V3+ -> V2+ using the CP electrode are 1.0 x 10(-3) and 1.1 x 10(-3) cm s(-1), respectively. The value of k (0) increases by one or two order(s) of magnitude compared with values obtained using electrodes composed of pyrolytic graphite and glassy carbon. The acceleration of the redox kinetics of vanadium ions is a result of the large surface area of the CP electrode. An inner-sphere mechanism for the reaction on the surface of the electrode is proposed. The kinetic features of vanadium redox reactions on the CP electrode reveal that CP is suitable for use as the electrodes in vanadium redox-flow batteries.
引用
收藏
页码：1183 / 1190
页数：8
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