Abstract
We have reported a fast and eco-friend method to synthesize the MnO2 on catalytically grown carbon nanofiber (CGCNF). The CGCNF was functionalized by acid treatment under various H2SO4/HNO3 ratios. A microwave-assisted hydrothermal method was then used to synthesize MnO2/CGCNF composites at a very short time of 5 min. We demonstrated that the surface modification has significant effect on the MnO2 deposition and the electrochemical performance of the resulting MnO2/CGCNF composites. Electrical impedance spectroscopy analysis and cyclic voltammetry showed that O-functional group controls the electrical conductivity and the electrochemical performance of both CGCNF and CGCNF/MnO2 composites, respectively. It was found that C[dbnd]O bond assists the MnO2 deposition. CGCNF/MnO2 composite showing specific capacitance (Csp) of 257 F/g at a scan rate of 5 mV/s and electrical resistance of 19 Ω was demonstrated.
Original language | English |
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Pages (from-to) | 54-63 |
Number of pages | 10 |
Journal | Thin Solid Films |
Volume | 620 |
DOIs | |
Publication status | Published - 2016 Dec 1 |
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Surfaces and Interfaces
- Surfaces, Coatings and Films
- Metals and Alloys
- Materials Chemistry