微波固相剥离法制备功能化石墨烯及其电化学电容性能研究(英文)  

Preparation of Functionalized Graphene Sheets via Microwave-Assisted Solid-State Process and Their Electrochemical Capacitive Behaviors

作　　者：薛露平[1] 郑明波[2] 沈辰飞[1] 吕洪岭[1] 李念武[1] 潘力佳[2] 曹洁明[1] 

机构地区：[1]南京航空航天大学材料科学与技术学院纳米材料研究所,南京210016 [2]南京大学微结构国家实验室电子科学与工程学院,南京210093

出　　处：《无机化学学报》2010年第8期1375-1381,共7页Chinese Journal of Inorganic Chemistry

基　　金：国家自然科学基金(No.6076019);江苏省自然科学基金(No.BK2006195);NCET资助项目

摘　　要：通过微波固相剥离氧化石墨制备了功能化石墨烯材料。石墨烯的剥离,是由于微波加热过程中氧化石墨烯片上的官能团分解为CO2和H2O,产生的压力超过了片层间的范德华力。形貌表征显示了石墨烯的有效剥离和纳米孔结构的形成。红外光谱分析结果表明微波剥离的功能化石墨烯仍然有少量的官能团残留。N2等温吸附-脱附测试结果表明样品具有高比表面积(412.9m2·g-1)和大孔容(1.91cm3·g-1)。电化学测试结果表明功能化石墨烯具有良好的电化学电容行为和207.5F·g-1的比电容。Functionalized graphene sheets were produced by microwave-induced exfoliation of graphene oxide. Exfoliation happens when the oxygen-containing groups decomposed into CO2 and H2O by microwave-heat,thus yielding pressures that exceed the Van der Waals attraction between the layers. X-ray diffraction,FTIR,SEM,TEM and nitrogen adsorption-desorption were used to characterize the samples. Scanning electron microscopy images show that the sample possesses nanoporous structures. Fourier-transform infrared spectroscopy characterization proves the existence of a few functional groups on the surface of graphene sheets. The results of nitrogen adsorption-desorption analysis indicate that the sample has high BET surface area （412.9 m2·g-1） and large pore volume （1.91 cm3·g-1）. The electrochemical tests show that the sample has good electrochemical capacitive behavior and high specific capacitance values about 207.5 F·g-1 in aqueous KOH.

关 键 词：功能化石墨烯 微波辐射 超级电容器 电化学测试 

分 类 号：O613.71[理学—无机化学]