聚吡咯/氧化石墨烯层状复合材料的制备及其在超级电容器中的应用(英文)  

Electrochemical Performances of Layered Polypyrrole/Chemically Reduced Graphene Oxide Nanocomposites as Supercapacitor Electrodes

作　　者：许思哲[1] 周雪皎[1] 吴坤[1] 杨永强[1] 吴海霞[1] 

机构地区：[1]上海交通大学微纳米科学与技术研究院,上海200240

出　　处：《电化学》2012年第4期348-358,共11页Journal of Electrochemistry

基　　金：supported by the National Natural Science Foundation of China(No.20906055);National"973 Program"(No.2010CB933900);the State Key Laboratory of Bioreactor Engineering(No.2060204)

摘　　要：通过将吡咯单体在低温下与氧化石墨烯进行原位聚合,获得聚吡咯/石墨烯(Ppy/CRGO)复合材料.采用场发射电子显微镜(FESEM)、红外(FT-IR)和热重分析(TGA)对复合物的表面形貌、结构进行表征.FESEM结果表明,通过控制氧化石墨烯(GO)和吡咯单体的质量比例,可以对复合物的层状和厚度进行调控.FT-IR和TGA结果表明,聚吡咯(Ppy)是通过化学键合的方式与氧化石墨烯复合在一起.通过机械冷压法将粉末状Ppy/CRGO复合物压成圆片电极,并探讨了石墨烯和聚吡咯复合比例、反应时间、烘干温度和孔隙率等因素对Ppy/CRGO复合物电极的电学和电化学性能的影响.结果表明,Ppy与CRGO质量比为10∶1所制得的Ppy/CRGO复合物的电容量为421 F·g-1,通过在电极中引入孔隙,电容量能进一步提升为509 F·g-1.Nanocomposites of polypyrrole （Ppy） and chemically reduced graphene oxide （ CRGO）, Ppy/ CRGO, have been fabricated through in-situ polymerization of pyrrole on graphene oxide （GO） sheets. The as-synthesized Ppy/CRGO composites were characterized complementarily using scanning electron microscopy （SEM）, tbermogravimetric analysis （TGA） and Fourier transformed infrared spectroscopy （FT-IR）. By control- ling the initial ratio of the GO to pyrrole, the layered composites could be obtained and their thickness could be tuned properly. The Ppy/CRGO electrodes were prepared using a mechanical compressing technique and their elec- trical conductivity and electrochemical properties were characterized systematically. We demonstrated that as elec-trodes for supercapacitor, the Ppy/CRGO composites with Ppy to CRGO mass ratio of 10：1 showed a competitive capacitance of 421F· g^ -1 that could be further increased to 509 F· g^ -1 by introducing pores in it, which is higher than that of Ppy alone. Given the manifest electrical and electrochemical properties, we envisage that the Ppy/ CRGO composites should find applications in supereapacitors.

关 键 词：氧化石墨烯 化学还原石墨烯 聚吡咯 复合物 超级电容器 

分 类 号：TM53[电气工程—电器]