期刊
CERAMICS INTERNATIONAL
卷 42, 期 10, 页码 12129-12135出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2016.04.145
关键词
Supercapacitor; V2O5; Carbon nanotubes; Super activated carbon
资金
- National Natural Science Foundation of China [51561006, 51461011, 51261005, 51461010, 51401059, 51361005, 51371060, U1501242]
- Guangxi Natural Science Foundation [2014GXNSFAA118318, 2014GXNSFBA118240, 2015GXNSFAA139282]
- Innovation Project of Guangxi Graduate Education [YCSZ2015153]
A ternary composite of V2O5/carbon nanotubes super activated carbon (V2O5/CNTs-SAC) was prepared by a simple hydrothermal method and used as a supercapacitor electrode material. The electrochemical performance of the electrode was analyzed using cyclic voltammetry, galvanostatic charge/discharge measurements, and electrochemical impedance spectroscopy, which were performed in 2 M NaNO3 as the electrolyte. The V2O5/CNTs-SAC nanocomposite exhibited a specific capacitance as high as 357.5 F g(-1) at a current density of 10 A g(-1), which is much higher than that of either bare V2O5 nanosheets or a V2O5/CNTs composite. Furthermore, the capacitance increased to 128.7% of the initial value after 200 cycles, with 99.5% of the maximum value being retained after 1000 cycles. These results demonstrated that the V2O5/CNTs-SAC ternary composite is suitable for use as an electrode material for supercapacitors. (C) 2016 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
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