物理化学学报2012，Vol.28Issue(6)：1387-1392,6.DOI:10.3866/PKU.WHXB201204013
水热氧化改性碳纸电极在全钒氧化还原电池中的应用
Modification of Carbon Paper Electrode via Hydrothermal Oxidation Applied in the Vanadium Redox Battery
摘要
Abstract
To improve the electrochemical activity of electrodes in the vanadium redox battery,carbon paper electrode was treated with a hydrogen peroxide and sulfuric acid solution,according to the hydrothermal acid oxidation method,in a Teflon-lined stainless steel autoclave over different time periods at 180 ℃.The water contact angle test showed that the contact angle of treated carbon paper samples changed from 120.0° to 100.8° by adjusting the treatment time from 6 to 18 h.Furthermore,a treatment time of 12 h resulted in the lowest contact angle observed,indicating that the wetting property of the carbon paper had been enhanced under these treatment conditions.Fourier transformation infrared spectroscopy results showed that oxygen-containing groups,such as the carbonyl and carboxyl groups,had been successfully introduced to the carbon papers.Scanning electron microscopy,cyclic vollammetry,electrochemical impedance spectroscopy,and charge-discharge tests were camied to characterize the surface topography and electrochemical properties of the carbon papers.The treated samples showed high activity in the redox reactions of V(IV)(N)(V).A single-cell employing carbon paper was treated for 12 h as an electrode and exhibited an excellent performance.The energy efficiency reached 80％ at a current density of 30 mA· cm-2.The corresponding coulombic and voltage efficiencies were 96％ and 84％,respectively.关键词
钒电池/碳纸/水热酸氧化/接触角/含氧基团/亲水性Key words
Vanadium redox battery/Carbon paper/Hydrothermal acid oxidation/Contact angle/Oxygen-containing group/Wetting property分类
化学化工引用本文复制引用
苏安群,汪南方,刘素琴,吴涛,彭穗..水热氧化改性碳纸电极在全钒氧化还原电池中的应用[J].物理化学学报,2012,28(6):1387-1392,6.基金项目
The project was supported by the National Key Basic Research Program of China (973) (2010CB227201) and National Natural Science Foundation of China (51072234) （973）
国家重点基础研究发展规划项目(973)(2010CB227201)及国家自然科学基金(51072234)资助 （973）
