標題: Probing the electrochemical properties of an electrophoretically deposited Co3O4/rGO/CNTs nanocomposite for supercapacitor applications
作者: Kumar, Nagesh
Huang, Chun-Wei
Yen, Po-Jen
Wu, Wen-Wei
Wei, Kung-Hwa
Tseng, Tseung Yuen
材料科學與工程學系
電子工程學系及電子研究所
Department of Materials Science and Engineering
Department of Electronics Engineering and Institute of Electronics
公開日期: 1-Jan-2016
摘要: This study reports the electrochemical performance of pseudosupercapacitor electrodes composed of cubic phase Co3O4 nanoparticles, reduced graphene oxide (rGO) and functionalized MWCNTs based nanocomposites. The Co3O4/rGO/CNTs nanocomposites have been synthesized using a hydrothermal method and the EPD technique has been used to make binder free electrodes of the nanocomposite materials for supercapacitor applications. The effects of graphene oxide (GO) concentration and the ratio of GO/CNTs on the electrochemical performance of the nanocomposite material have been investigated. From the experimental results, the Co3O4/rGO/CNTs nanocomposite synthesized with 2 mg mL (1) GO concentration and 10 : 1 GO/CNT ratio exhibits a good specific capacitance of 850 F g (1) at a 5 mV s(-1) scan rate and 790 F g(-1) at 1 A g(-1), excellent rate capability and good cyclability in 1 M KOH. Furthermore, we have successfully designed an aqueous electrolyte-based asymmetric pseudocapacitor using Co3O4/rGO/CNTs nanocomposite as an anode and N-doped graphene nanocomposite as a cathode. The operating voltage of our optimized asymmetric pseudocapacitor is 1.4 V and it exhibits the maximum energy density and power density of 19.6 W h kg(-1) and 7250 W kg(-1), respectively. These results suggest that our EPD grown nanocomposite binder free electrode and our designed asymmetric pseudocapacitor have a good potential for practical applications.
URI: http://dx.doi.org/10.1039/c6ra11399k
http://hdl.handle.net/11536/133978
ISSN: 2046-2069
DOI: 10.1039/c6ra11399k
期刊: RSC ADVANCES
Volume: 6
Issue: 65
起始頁: 60578
結束頁: 60586
Appears in Collections:Articles


Files in This Item:

  1. 9423860fb28b5601a2aa4872fa3d6bc6.pdf