化工进展2018，Vol.37Issue(7)：2712-2719,8.DOI:10.16085/j.issn.1000-6613.2017-1626
硫氮共掺杂石墨烯的制备及其电化学性能
Preparation and electrochemical properties of sulfur-nitrogen co-doped graphene
摘要
Abstract
The modified Hummers method was used to prepare graphite oxide (GO) through freeze drying. The sulfur-nitrogen co-doped graphene samples were then synthesized by one-step hydrothermal method using thiourea as dopant and reductant,with mass ratios of GO to thiourea of 1:10, 1:20, 1:30, 1:40 respectively. The microstructure and morphology of the as-produced graphene were characterized by X-ray diffraction, field emission scanning electron microscope, Raman spectroscopy, X-ray photoelectron spectroscopy and nitrogen adsorption-desorption analysis. The electrochemical performances of the samples were investigated by cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS) and galvanostatic charge/discharge (GCD) technology. The results showed that the sulfur-nitrogen co-doped graphene had the highest sulfur content of 1.86% and nitrogen content of 7.73%, with a specific surface area of 175.8m2/g and the pore sizes were narrowly distributed in between 3—5nm when the mass ratio of GO:thiourea is 1:30. At 1A/g current density, SNG had a specific capacitance of 197.2F/g, and only 10% were lost after 2000 charge and discharge cycles.关键词
石墨烯/水热/制备/显微结构/电化学Key words
graphene/hydrothermal/preparation/microstructure/electrochemistry分类
化学化工引用本文复制引用
李子庆,赫文秀,张永强,刘斌,蒋梦,刘君红..硫氮共掺杂石墨烯的制备及其电化学性能[J].化工进展,2018,37(7):2712-2719,8.基金项目
国家自然科学基金(21766024)、内蒙古自然科学基金(2015MS0208)、内蒙古自治区高等学校青年科技英才计划-青年科技领军人才A类项目(NJYT-14-A08)及包头市科技计划(2015C2004-1, 2016-4)项目. （21766024）
