School of Materials Science and Engineering, Huazhong University of Science and Technology, 430074 Wuhan, China.
Nanoscale. 2013 Apr 7;5(7):3052-7. doi: 10.1039/c3nr33641g.
A rationally designed graphene-hollow polypyrrole (PPy) nanoarchitecture in which hollow PPy spheres were inserted between graphene layers was constructed by mixing graphene oxide and polystyrene (PS)@PPy core-shell sphere, followed by reduction of graphene oxide and etching of PS. The as-prepared graphene-hollow PPy nanoarchitecture was explored as electrode material for supercapacitor applications. The specific capacitance may gradually rise to as high as 500 F g(-1) with a charging/discharging current density of 5 A g(-1), and remains stable even after 10,000 cycles. Analysis indicates that the tailored nanoarchitecture enhances specific area of the electrode and promotes synergetic effect between RGO and PPy, thus leading to a significantly enhanced electrochemical performance.
通过混合氧化石墨烯和聚苯乙烯（PS）@PPy 核壳球，然后还原氧化石墨烯并刻蚀 PS，构建了一种在石墨烯层之间插入空心 PPy 球的合理设计的石墨烯空心聚吡咯（PPy）纳米结构。所制备的石墨烯空心 PPy 纳米结构被探索用作超级电容器应用的电极材料。在 5 A g(-1)的充电/放电电流密度下，比电容可逐渐升高至高达 500 F g(-1)，甚至在 10000 次循环后仍保持稳定。分析表明，这种定制的纳米结构提高了电极的比表面积，并促进了 RGO 和 PPy 之间的协同效应，从而显著提高了电化学性能。
