The effects of surface modification on carbon felt electrodes for use in vanadium redox flow batteries

被引：262
|
作者：
Kim, Ki Jae [1 ]
Kim, Young-Jun [1 ]
Kim, Jae-Hun [1 ]
Park, Min-Sik [1 ]
机构：
[1] Korea Elect Technol Inst, Adv Batteries Res Ctr, Songnam 463816, Gyeonggi, South Korea
来源：
MATERIALS CHEMISTRY AND PHYSICS | 2011年 / 131卷 / 1-2期
关键词：
Carbon felt; Electrochemistry; Redox flow batteries; Surface modification; COMPOSITE ELECTRODES; CELL; NANOTUBES;
D O I：
10.1016/j.matchemphys.2011.10.022
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The surface of carbon felt electrodes has been modified for improving energy efficiency of vanadium redox flow batteries. For comparative purposes, the effects of various surface modifications such as mild oxidation, plasma treatment, and gamma-ray irradiation on the electrochemical properties of carbon felt electrodes were investigated at optimized conditions. The cell energy efficiency was improved from 68 to 75% after the mild oxidation of the carbon felt at 500 degrees C for 5 h. This efficiency improvement could be attributed to the increased surface area of the carbon felt electrode and the formation of functional groups on its surface as a result of the modification. On the basis of various structural and electrochemical characterizations, a relationship between the surface nature and electrochemical activity of the carbon felt electrodes is discussed. (C) 2011 Elsevier B.V. All rights reserved.
引用
收藏
页码：547 / 553
页数：7
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