石墨烯纳米片的简易合成及其超级电容性能研究  

Facile Synthesis and Supercapacitor Properties of Graphene Nanosheets

作　　者：刘奕[1,2] 赵玉亮[1] 高兆芬[3] 姜霞[1] 曾宇平[2] 

机构地区：[1]枣庄学院化学化工与材料学院,枣庄277160 [2]中国科学院上海硅酸盐研究所,上海200050 [3]上饶师范学院化学系,上饶334001

出　　处：《无机材料学报》2013年第6期611-615,共5页Journal of Inorganic Materials

基　　金：国家自然科学基金(50872142/E0207);山东省自然科学基金(2010ZRA04003)~~

摘　　要：以硫代氨基脲(CH5N3S)为还原剂,通过还原氧化石墨(GO)制备了石墨烯纳米片(GNS)。利用XRD,FE-SEM,AFM和UV-Vis光谱对产物的结构和形貌进行分析,并使用循环伏安和恒流充放电等测试手段来表征其超级电容性能。实验结果表明,所制备的GNS具有良好的结晶状态,并且在水溶液中具有良好的分散性。以GNS纳米片为电极材料,在3 mol/L KOH电解质溶液中,在500 mA/g电流密度测试条件下所得比电容量为75 F/g。而且GNS纳米片显示出了良好的电化学循环稳定性。Graphene nanoplates （GNS） were prepared from oxided graphite by using thiosemicarbazide （CHsN3S） as a reducing agent. The microstructures and morphologies of products were subsequently characterized by XRD, FE-SEM, AFM and UV-Vis adsorption spectra. The performances of super-capacitor were characterized using cyclic voltammetry and constant current charge-discharge tests. The experimental results indicated that the as-prepared GNS possessed fair crystalline state and admirable aqueous dispersibility. An electrode prepared from GNS exhibited a specific capacitance of 75 F/g at a current density of 500 mA/g in 3 rnol/L KOH electrolyte. Moreover, the GNS showed excellent electrochemical cycle performance.

关 键 词：石墨烯纳米片 硫代氨基脲 超级电容性能 

分 类 号：TQ174[化学工程—陶瓷工业]