Preparation and electrochemical properties of three-dimensional nitrogen-doped graphite at different temperatures

被引：0
|
作者：
Li Z. [1 ]
He W. [1 ]
Zhang Y. [1 ]
Wang Y. [1 ]
Liu B. [1 ]
机构：
[1] School of Chemistry and Chemical Engineering, Inner Mongolia University of Science &Technology, Baotou
来源：
He, Wenxiu (nmghwx@sina.com) | 2018年 / Chinese Ceramic Society卷 / 46期
关键词：
Graphite oxide; Hydrothermal method; Nitrogen-doped; Specific capacitance; Urea;
D O I：
10.14062/j.issn.0454-5648.2018.04.11
中图分类号：
学科分类号：
摘要：
The three-dimensional nitrogen-doped graphene was synthesized by one-step hydrothermal method using urea as a reducing-doping agent and graphene oxide (GO) as a raw material. The morphology, structure and components of the as-produced graphene were characterized by Fourier transform infrared spectroscopy, X-ray diffraction, Field emission scanning electron microscopy, Raman spectroscopy, X-ray photoelectron spectroscopy and electrical conductivity measurements, respectively. The samples were electrochemically tested by cyclic voltammetry, AC impedance, constant current charge and discharge measurements. The results show that GO can be effectively reduced by urea and nitrogen-doped graphene with different nitrogen proportions from 4.07% to 9.18% are obtained at different hydrothermal temperatures. Nitrogen is doped into graphene lattice in three forms, i.e., "pyridinic N", "pyrrolic N" and "graphitic N". In 6 mol/L KOH electrolyte, nitrogen-doped graphene obtained at 180 °C has a maximum specific capacitance of 187.6 F/g at 0.3 A/g current density. ©2018, Editorial Department of Journal of the Chinese Ceramic Society. All right reserved.
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页码：529 / 536
页数：7
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