Electrochemical oxidation of graphite felt was investigated so as to enhance the electrochemical performance of this material for using in vanadium redox cell. Electrochemical activity of the graphite felt in vanadium electrolyte increases with its extent of oxidation. Cell voltage efficiency of over 90% and current efficiency of over 92% are obtained after treatment. Both XPS and FT-IR analysis demonstrates that surface functional groups of COOH increase mainly compared with untreated samples. SEM shows the surfaces are eroded. BET/N2 measurements show the surface area increases. The improvement of electrochemical activity for the electrode is ascribed to the increase of the number of COOH group and the special surface.
HUANG Ke-Long
,
TAN Ning
,
LIU Su-Qin
,
CHEN Li-Quan
. Electrochemical Modification of Graphite Felt Electrode for Vanadium Redox Flow Battery[J]. Journal of Inorganic Materials, 2006
, 21(5)
: 1114
-1120
.
DOI: 10.3724/SP.J.1077.2006.01114
[1] Carl Johan Rydh. J. Power Sources, 1999, 80: 21--29.
[2] The vanadium redox battery, UNSW, http://www.ceic.unsw.edu.au/centers/vrb/, 2004-8-1
[3] Joerissen L, Garche J, Fabjan C, et al. J. Power Sources, 2004, 127(1-2): 98--104.
[4] Fabjan C, Gache J, Harrer B, et al. Electrochimica Acta, 2001, 47(5): 825--831.
[5] 赵平, 张华民, 周汉涛. 电池工业, 2005, 10(2): 96--99.
[6] 罗冬梅, 许茜, 隋智通. 电源技术, 2004, 28(2): 94--96.
[7] 李华, 常守文, 严川伟. 电化学, 2002, 8(3): 257--261.
[8] Zhong S, Padeste C, Kazacos M, et al. J. Power sources, 1993, 45: 29--41.
[9] Sun B, Skyllas-Kazacos M. Electrochim Acta, 1992, 37(7): 1253--1260.
[10] Sun B, Skyllas-Kazacos M. Electrochim Acta, 1992, 37(13): 2459--2465.
[11] 陈艳辉, 张兴堂, 薛中会, 等(Chen Yan-hui, et al). 无机材料学报(Journal of Inorganic Materials), 2005, 20(1): 59--64.
[12] 罗列超, 赵荣根, 孟佳, 等(Luo Lie-chao,et al). 无机材料学报(Journal of Inorganic Materials), 2002, 17(6): 1269--1276.
[13] Yue Z R, Jiang W, Wang L, et al. Carbon, 1999, 37: 1785--1796.
