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首页> 外文会议>International Conference on Materials for Renewable Energy and Environment >Electrocatalytic activity of multi-walled carbon nanotubes for VOsup2amp;#x002B;/sup/VOinf2/infsupamp;#x002B;/sup of a vanadium redox flow battery
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Electrocatalytic activity of multi-walled carbon nanotubes for VOsup2amp;#x002B;/sup/VOinf2/infsupamp;#x002B;/sup of a vanadium redox flow battery

机译：VO 2＆＃x002b多壁碳纳米管的电催化活性; / vo 2 ＆＃x002b; 钒氧化还原流量电池

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摘要

Graphite powder (GP) and multi-walled carbon nanotubes (CNT) composite electrodes were prepared at various ratios for all-vanadium redox flow battery. The surface morphologies of the composite electrodes were characterized by scanning electron microscope (SEM), and electrochemical behaviors were investigated by cyclic voltammetry, chronoamperometry and impedance spectroscope. It is found from the observation of SEM that the surface roughness of GP-CNT composite electrodes increases after adding CNT to GP. Through Chronoamperometry we can obtain that the real superficial area of CNT electrode is about 8 times greater than that of GP electrode. The results of cyclic voltammograms indicate that the electrochemical performances of the composites were improved greatly with increasing the amount of CNT. The pure CNT electrode has the best electrochemical performance; the enhanced electrochemical activity may be ascribed to the high electrical conductivity and large specific surface area of CNT.
机译：石墨粉末（GP）和多壁碳纳米管（CNT）复合电极以各种钒氧化还原流电池制备。通过扫描电子显微镜（SEM）表征复合电极的表面形态，并通过循环伏安法，计时率和阻抗分光镜研究了电化学行为。从SEM观察到GP-CNT复合电极的表面粗糙度增加到添加CNT至GP后的粗糙度增加。通过计时法测定，可以获得CNT电极的真正浅表区域比GP电极大约8倍。循环伏安图的结果表明，随着CNT的量增加，复合材料的电化学性能大大提高。纯CNT电极具有最佳的电化学性能;增强的电化学活性可以归因于CNT的高电导率和大的比表面积。

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