| ZHONG Qi-neng,SU Ze-long,LI Xin-lu.Preparation and Supercapacitor Performance of a Flexible Nitrogen-doped Graphene Film[J],44(1):51-55,63 |
| Preparation and Supercapacitor Performance of a Flexible Nitrogen-doped Graphene Film |
| Received:December 22, 2014 Revised:January 20, 2015 |
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| KeyWord:N-doped graphene porous structure supercapacitor |
| Author | Institution |
| ZHONG Qi-neng |
School of Materials Science and Engineering, Chongqing University, Chongqing , China |
| SU Ze-long |
School of Materials Science and Engineering, Chongqing University, Chongqing , China |
| LI Xin-lu |
School of Materials Science and Engineering, Chongqing University, Chongqing , China |
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| Abstract: |
| Objective To improve the electrochemical performance of graphene films for supercapacitors. Methods Flexible nitrogen-doped graphene (N-doped graphene) films with porous structure were synthesized by hydrothermal and pyrolysis methods. The structure of the N-doped graphene films were analyzed by scanning electron microscope (SEM), X-ray diffraction (XRD) and isotherms. The electrochemical capacitance of N-doped graphene films was examined by three-electrode system test cyclic voltammetry and galvanostatic charge-discharge methods. Results The experiments indicated that the flexible N-doped graphene films retained the folded and transparent characteristics of graphene oxide, and formed a three-dimensional porous structure as well. The surface area of N-doped grapheme was measured to be 280. 78 m2 / g by the nitrogen adsorption-desorption test. The specific discharge capacitance for the material was 169 F/ g in 1. 0 mol/ L NaSO4 solution when the current density was 0. 1 A/ g. Conclusion The doping of nitrogen atoms and the porous structure of the flexible N-doped graphene films could effectively improve the supercapacitor performance of the graphene material. |
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