Facile Synthesis of Nitrogen-Doped Graphene Aerogels for Electrode Materials in Supercapacitors

Three-dimensional porous nitrogen-doped graphene aerogels （NGAs） were synthesized by using graphene oxide （GO） and chitosan （CS） via a self-assembly process by one-pot hydrothermal method. The morphology and struc- ture of the as-prepared materials were characterized by means of scanning electron mi...

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Bibliographic Details
Published in:Chinese journal of chemistry 2017-07, Vol.35 (7), p.1069-1078
Main Authors: Zhang, Yong, Zhu, Jiayi, Ren, Hongbo, Bi, Yutie, Zhang, Lin
Format: Article
Language:English
Subjects:
Adsorption
Aerogels
Assembly
Capacitance
Chitosan
Current density
Desorption
Discharge
Electrochemical analysis
Electrochemistry
Electrode materials
Electron microscopy
Fourier analysis
Fourier transforms
Graphene
hydrothermal synthesis
Impedance
Impedance spectroscopy
Infrared spectroscopy
mesoporous materials
Nitrogen
nitrogen‐doped graphene aerogels
Porous materials
Raman spectroscopy
Scanning electron microscopy
Self-assembly
Spectroscopic analysis
Spectroscopy
Spectrum analysis
Supercapacitors
Surface area
Transmission electron microscopy
Voltammetry
X-ray diffraction
傅里叶变换红外光谱
扫描电子显微镜
掺杂石墨
气凝胶
氮吸附
电极材料
简易合成
超级电容器
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Summary:Three-dimensional porous nitrogen-doped graphene aerogels （NGAs） were synthesized by using graphene oxide （GO） and chitosan （CS） via a self-assembly process by one-pot hydrothermal method. The morphology and struc- ture of the as-prepared materials were characterized by means of scanning electron microscopy, transmission elec- tron microscopy, X-ray diffraction, XPS spectroscopy, Raman spectroscopy, nitrogen adsorption/desorption meas- urement and Fourier transform infrared spectroscopy. The electrochemical performance of NGAs was studied by cyclic voltammetry, galvanostatic charge/discharge and impedance spectroscopy measurements. The microstructure, surface area and capacitance of NGAs could be facilely controlled by adding different amounts of chitosan. The prepared NGA-4 showed a specific capacitance of 148.0 F/g at the discharge current density of 0.5 A/g and also re- tained 95.3% of the initial capacitance after 5000 cycles at the scan rate of 10 mV/s. It provided a possible way to obtain graphene based materials with high surface area and capacitance.
ISSN:1001-604X
1614-7065
DOI:10.1002/cjoc.201600854