聚吡咯/石墨烯复合材料的制备及电化学性能

Preparation and electrochemical properties of polypyrrole/graphene composites

为改善聚吡咯的电化学性能,以化学氧化还原法制得的石墨烯为填料,采用原位聚合法制备聚吡咯/石墨烯复合材料。利用扫描电子显微镜、拉曼光谱与红外光谱表征样品。结果表明,所制备的石墨烯呈现大面积薄纱状组织形貌,且为双层或多层结构。聚吡咯为球状形貌,粒径约为200 nm,石墨烯在聚吡咯中分散效果较好。石墨烯提高了聚吡咯的比电容,改善了聚吡咯的电化学可逆性。

This paper is aimed at improving the electrochemical properties of polypyrrole.The research involves preparing polypyrrole/graphene composites using in situ polymerization and using graphene prepared by chemical redox method as packing;and characterizing the sample using X-ray diffraction,scanning electron microscope,Raman spectroscopy,and infrared spectroscopy.The result shows that the graphene obtained in our experiment exhibits widespread gossamer tissue morphology featuring double layer or multilayer structure;and polypyrrole is of a spherical shape with a size of 200 nm,meaning that graphene boasts a better dispersing effect in polypyrrole.It follows that the presence of graphene could increase the capacitance of polypyrrole,thus improving the electrochemical reversibility of polypyrrole.