石墨烯/聚吡咯复合物的制备及超级电容性能研究

Preparation and Supercapacitive Properties of the Graphene/Polypyrrole Composites

采用石墨烯/聚吡咯(r GO/PPY)复合物制备超级电容器,以弥补二者各自的不足。采用改进Hummers法制备出氧化石墨烯(GO)。利用水合肼还原法将GO还原后得到r GO,同时采用电化学聚合法制备出PPY。最后,用电沉积法直接在不锈钢网上制备出r GO/PPY复合物。得到的复合材料的比电容为209.04 F/g,显著高于r GO的比电容(52.42 F/g)。另外,循环1 000次后,复合材料的比电容下降18.1%,低于PPY(36.3%)。

Graphene（rGO） and polypyrrole（PPY） as good conductive materials were often used in the preparation of super capacitors. However, the usage of both rGO and PPY had its advantages and disadvantages in the preparation of super capacitors. In this paper, graphene/polypyrrole （rGO/PPY） composites were used to prepare the super capacitors. Graphene oxide（GO） was prepared by an improved Hummers method. The hydrazine hydrate reduction method is used to reduce GO to obtain graphene （rGO） while PPY was prepared by electrochemical polymerization. In the end, rGO/PPY composite was prepared directly on stainless steel net by electrodeposition. The specific capacitance of the composite material is 209.04 F/g, which was significantly higher than the capacitance of rGO （52.42 F/g）. In addition, the cycle of 1000 times, the specific capacitance of the composites decreased by 18.1%, which was lower than that of the PPY （36.3%）.