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- Title
Facile preparation of MnO@C composite nanorods for high-performance supercapacitors.
- Authors
Guo, Zengcai; Mu, Jingbo; Che, Hongwei; Wang, Guangshuo; Liu, Aifeng; Zhang, Xiaoliang; Zhang, Zhixiao
- Abstract
Novel MnO@C composite nanorods were successfully prepared by a facile solvothermal method. The results showed that a uniform carbon layer was formed around the MnO nanorods. The carbon layer provided a highly conductive pathway to boost the charge transport involved during the capacitance generation. The electrochemical properties of MnO@C composite nanorods were investigated by cyclic voltammetry and galvanostatic charge-discharge. The composites as electrode materials of supercapacitors exhibited high specific capacitance (295 F/g) compared with MnO nanorods (149 F/g) with a wide operation window (0-1.0 V). The electrochemical impedance spectroscopic studies showed the charge-transfer resistance (R) of the MnO@C composite nanorods (1.10 Ω) was much lower than that of pure MnO (2.53 Ω). Moreover, the MnO@C composite nanorods exhibited excellent cycling behavior with no more than 5 % capacitance loss after 2000 cycles. These results indicated that the MnO@C composite nanorods could be a promising electrode material for high-performance electrochemical capacitors.
- Subjects
NANORODS; SUPERCAPACITOR performance; CYCLIC voltammetry; ELECTRIC capacity; CHARGE transfer
- Publication
Journal of Materials Science: Materials in Electronics, 2016, Vol 27, Issue 12, p13314
- ISSN
0957-4522
- Publication type
Article
- DOI
10.1007/s10854-016-5481-6