Influence of Fenton's reagent treatment on electrochemical properties of graphite felt for all vanadium redox flow battery

被引：156

作者：

Gao, Chao ^{[1
]}

Wang, NanFang ^{[2
]}

Peng, Sui ^{[1
]}

Liu, SuQin ^{[1
]}

Lei, Ying ^{[1
]}

Liang, XinXing ^{[1
]}

Zeng, ShanShan ^{[1
]}

Zi, HuiFang ^{[1
]}

机构：

[1] Cent S Univ, Key Lab Resources Chem Nonferrous Met, Minist Educ, Coll Chem & Chem Engn, Changsha 410083, Hunan, Peoples R China

[2] Hunan Inst Engn, Sch Chem & Chem Engn, Xiangtan 411104, Peoples R China

来源：

ELECTROCHIMICA ACTA | 2013年 / 88卷

关键词：

Fenton's reagent; Hydroxylated-functionalization; Graphite felt; Vanadium redox flow battery; Electrochemical activity; WALLED CARBON NANOTUBES; NITRIC-ACID OXIDATION; POSITIVE ELECTRODE; V(IV)/V(V); COUPLE;

D O I：

10.1016/j.electacta.2012.10.021

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：

An environmental, economic and highly effective method for carbon fiber hydroxylated-functionalization based on Fenton's reagent treatment is used to improve the electrochemical activity of graphite felt (GF) as the positive electrode in all vanadium redox flow battery (VRFB). The effect of H2O2 content in Fenton's reagent on the structure and electrochemical properties of GF is investigated. The scanning electron microscope (SEM) indicates that the surface of the treated GF is etched increasingly with the content of H2O2. The Fourier transformation infrared (FIR) spectroscopy shows that the peak intensity of hydroxyl groups on the treated felt is increased with the H2O2 concentration, which is further verified by X-ray photoelectron spectroscopy (XPS). Cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) show that the treated sample exhibits a higher electrochemical activity. A VRFB with the treated GF as electrodes exhibits higher coulombic, voltage and energy efficiency (98.8%, 75.1% and 74.2%) than that with the untreated GF (93.9%, 72.1% and 67.7%) at 60 mA cm(-2), and this method is even superior when compared with the reported methods. (C) 2012 Elsevier Ltd. All rights reserved.

引用

页码：193 / 202

页数：10

共 44 条

[1]

Evaluation of electrolytes for redox flow battery applications [J].