热膨胀制备含氧官能团化的石墨烯及其电化学电容性能  

Synthesis of Graphene with Oxygen-containing Functional Groups via Thermal Expension and Its Electrochemical Capacitive Performances

作　　者：常郑[1] 王欢文[1] 胡中爱[1] 杨玉英[1] 张子瑜[1] 

机构地区：[1]西北师范大学化学化工学院,甘肃省高分子材料重点实验室,生态环境相关高分子材料教育部重点实验室,兰州730070

出　　处：《材料导报》2012年第18期49-53,共5页Materials Reports

基　　金：国家自然科学基金(20963009);甘肃省自然科学基金(0803RJA005)

摘　　要：在空气气氛、150℃的条件下直接热处理氧化石墨获得含氧官能团化的石墨烯。采用X射线衍射(XRD)、傅里叶变换红外光谱(FT-IR)、场发射扫描电镜(FESEM)和透射电镜(TEM)对其结构和形貌进行表征。利用循环伏安(CV)、恒流充放电技术对其电化学性能进行测试。结果表明,所制备的含氧官能团化的石墨烯表现出优良的电容性能,其单电极比电容值高达275F/g,且具有良好的倍率特性和循环性能。Graphene with oxygen-containing functional groups was successfully prepared through thermal ex- pension treatment in air atmosphere at 150℃. Its morphology and structure were characterized using powder X-ray diffraction （XRD）, Fourier transform infrared spectrum （FT-IR）, field emission scanning electron microscopy （FESEM）, and transmission electron microscope （TEM）, respectively. The electrochemical performances were inves- tigated by cyclic voltammetry （CV） and galvanostatic charge-discharge techniques. The results show that the as-pre- pared samples have a typical morphology feature and exhibit excellent electrochemical capacitive performances. The specific capacitance is up to 275F/g in the case of single electrode. In addition, it displays excellent rate capability and well cycling ability.

关 键 词：石墨烯 热膨胀 比电容 超级电容器 

分 类 号：TQ152[化学工程—电化学工业]