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http://dx.doi.org/10.4313/JKEM.2009.22.6.532

Capacity Change of Supercapacitor by Surface Treatment of Carbon Nanotubes  

Kim, Yong-Tae (부산대학교 기계공학부)
Publication Information
Journal of the Korean Institute of Electrical and Electronic Material Engineers / v.22, no.6, 2009 , pp. 532-536 More about this Journal
Abstract
In this study, the capacity change of supercapacitor was investigated by surface treatments of carbon nanotubes as electrode materials with various methods, such as ball-milling, $KMnO_4$ and $H_2SO_4/HNO_3$ acid mixture. Surface treatments generated a number of defects on the surface of carbon nanotubes by attacking on $\pi$ bond in graphene layer, at which carboxyl groups were introduced. These hydrophilic groups could enhance the capacity by increasing the wettability of carbon nanotube surfaces. However, a drawback of the surface treatment was the decrease of conductivity by the loss of conduction path in graphene layer due to the defect formation. The surface treatment condition should be therefore optimized between hydrophilicity increase and conductivity decrease.
Keywords
Supercapacitor; Carbon nanotubes; Surface treatments; Hydrophilicity; Conductivity;
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Times Cited By KSCI : 1  (Citation Analysis)
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