One-pot synthesis of functionalized few-walled carbon nanotube/MnO 2 composite for high performance electrochemical supercapacitors


Journal Article

In this paper, we described a one-pot approach to synthesize functionalized few-walled carbon nanotubes (fFWNTs)/MnO 2 composite for high performance electrochemical supercapacitor by mixing raw FWNTs with KMnO 4 under acidic condition. This approach combines the purification and functionalization of FWNTs and the synthesis of fFWNTs/MnO 2 composite in one step. The electrochemical performance of the composite was evaluated by cyclic voltammetry and galvanostatic charge-discharge techniques. The results indicate that the composite with 51wt% of MnO 2 has the high specific capacitance of 253 F/g (496 F/g based on MnO 2 ) at 10 mV/s and 176 F/g at the high scan rate of 500 mV/s (66% retention), indicating improved specific capacitance and excellent rate capability. Furthermore, the composite show superior electrochemical stability over 2000 charge/discharge cycles at the current density of 5 A/g. Therefore, this simplified one-pot approach of making the fFWNT/MnO 2 composite show high promises towards practical application in supercapacitors.

Duke Authors

Cited Authors

  • Cheng, Y; Zhang, H; Lu, S; Zhan, S; Varanasi, C; Liu, J

Published Date

  • January 30, 2013

Published In

Volume / Issue

  • 239 /

Start / End Page

  • 271 - 281

International Standard Serial Number (ISSN)

  • 1042-1122

Citation Source

  • Scopus