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3722845 
Journal Article 
Coaxial Cable Structure of Manganese Dioxide-Carbon Fiber Composite with High Capacitance Retention for Supercapacitor 
Tao, H; Zhang, S; Cheng, Y; Zhang, X; Tong, X; Dang, J 
2015 
1 
Nanoscience and Nanotechnology Letters
ISSN: 1941-4900 
7 
7 
555-559 
WOS:000361930300003 
A novel manganese dioxide-carbon fiber composite with coaxial cable structure is successfully prepared by a direct redox reaction with KMnO4 and carbon fiber. The composite is combined by carbon fiber cable tracer and MnO2 cable jacket and it is investigated by scanning electron microscopy, energy dispersive X-ray spectroscopy and X-ray diffraction. The supercapacitor performance of the composite is tested by cyclic voltammetry, electrochemical impedance spectroscopy and galvanostatic charge-discharge. Its initial capacitance is 196 F g(-1) at the current density of 0.6 A g(-1). The coulombic efficiency is almost 100% with the capacitance above 131.3 F g(-1) during the continuous 10,000 cycles. The results indicate that the composite has high capacitance retention and a superior coulombic efficiency at long cycles. It is a promising canadiate for supercapacitor in practical applications. 
Manganese Dioxide; Carbon Fiber; Coaxial Cable Structure; Supercapacitor