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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%)。
Supercapacitors were fabricated using graphene / polypyrrole (r GO / PPY) composites to compensate for their respective deficiencies. Graphene oxide (GO) was prepared by the modified Hummers method. The GO was obtained by reduction of GO with the hydrazine hydrate reduction method, and PPY was prepared by electrochemical polymerization. Finally, r GO / PPY complexes were prepared directly on stainless steel mesh by electrodeposition. The specific capacitance of the obtained composite was 209.04 F / g, which was significantly higher than that of r GO (52.42 F / g). In addition, after 1 000 cycles, the specific capacitance of the composites decreased 18.1%, lower than PPY (36.3%).