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Fabrication and electrochemical performance of graphene-ZnO nanocomposites |
| Li Zhen-Peng (李振鹏), Men Chuan-Ling (门传玲), Wang Wan (王婉), Cao Jun (曹军) |
| School of Energy and Power Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China |
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Abstract Graphene-ZnO nanocomposites were synthesized successfully through a one-step solvothermal approach. The morphology, structure, and composition of the prepared nanocomposites were investigated by scanning electron microscopy (SEM), transmission electron microscope (TEM), laser micro Raman spectroscopy, and Fourier transform infra-red spectroscopy (FT-IR). The outcomes confirmed that this approach is comparatively steady, practicable, and operable compared with other reported methods. The electrochemical performance of the graphene-ZnO electrodes was analyzed through cyclic voltammetry, altering-current (AC) impedance, and chronopotentiometry tests. The graphene-ZnO electrodes exhibited an improved electrode performance with higher specific capacitance (115 F·g-1), higher electrochemical stability, and higher energy density than the graphene electrodes and most reported graphene-ZnO electrodes. Graphene-ZnO nanocomposites have a steady reversible charge/discharge behavior, which makes them promising candidates for electrochemical capacitors (ECs).
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Received: 15 October 2013
Revised: 25 November 2013
Accepted manuscript online:
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PACS:
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72.80.Tm
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(Composite materials)
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82.45.Rr
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(Electroanalytical chemistry)
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82.47.Uv
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(Electrochemical capacitors; supercapacitors)
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| Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 61265004, 51272097, and 11204113), the Nature and Science Fund from Yunnan Province Ministry of Education, China (Grant No. 2011C13211708), and the Natural Training Project from University of Shanghai for Science and Technology, China (Grant No. 14XPM06). |
Corresponding Authors:
Men Chuan-Ling
E-mail: qiu@kmust.edu.cn
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| About author: 72.80.Tm; 82.45.Rr; 82.47.Uv |
Cite this article:
Li Zhen-Peng (李振鹏), Men Chuan-Ling (门传玲), Wang Wan (王婉), Cao Jun (曹军) Fabrication and electrochemical performance of graphene-ZnO nanocomposites 2014 Chin. Phys. B 23 057205
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