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

Publication ,  Journal Article
Cheng, Y; Zhang, H; Lu, S; Zhan, S; Varanasi, C; Liu, J
Published in: Ceramic Transactions
January 1, 2013

In this paper, we described a one-pot approach to synthesize functionalized few-walled carbon nanotubes (fFWNTs)/MnO2 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/MnO2 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 MnO2 has the high specific capacitance of 253 F/g (496 F/g based on MnO2) 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/MnO2 composite show high promises towards practical application in supercapacitors.

Duke Scholars

Published In

Ceramic Transactions

DOI

ISSN

1042-1122

Publication Date

January 1, 2013

Volume

239

Start / End Page

271 / 281
 

Citation

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Cheng, Y., Zhang, H., Lu, S., Zhan, S., Varanasi, C., & Liu, J. (2013). One-pot synthesis of functionalized few-walled carbon nanotube/MnO 2 composite for high performance electrochemical supercapacitors. Ceramic Transactions, 239, 271–281. https://doi.org/10.1002/9781118585160.ch25
Cheng, Y., H. Zhang, S. Lu, S. Zhan, C. Varanasi, and J. Liu. “One-pot synthesis of functionalized few-walled carbon nanotube/MnO 2 composite for high performance electrochemical supercapacitors.” Ceramic Transactions 239 (January 1, 2013): 271–81. https://doi.org/10.1002/9781118585160.ch25.
Cheng Y, Zhang H, Lu S, Zhan S, Varanasi C, Liu J. One-pot synthesis of functionalized few-walled carbon nanotube/MnO 2 composite for high performance electrochemical supercapacitors. Ceramic Transactions. 2013 Jan 1;239:271–81.
Cheng, Y., et al. “One-pot synthesis of functionalized few-walled carbon nanotube/MnO 2 composite for high performance electrochemical supercapacitors.” Ceramic Transactions, vol. 239, Jan. 2013, pp. 271–81. Scopus, doi:10.1002/9781118585160.ch25.
Cheng Y, Zhang H, Lu S, Zhan S, Varanasi C, Liu J. One-pot synthesis of functionalized few-walled carbon nanotube/MnO 2 composite for high performance electrochemical supercapacitors. Ceramic Transactions. 2013 Jan 1;239:271–281.

Published In

Ceramic Transactions

DOI

ISSN

1042-1122

Publication Date

January 1, 2013

Volume

239

Start / End Page

271 / 281