Key Laboratory of Organofluorine Chemistry and Laboratory of Polymer Materials, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences , 345 Lingling Road, Shanghai 200032, People's Republic of China.
ACS Appl Mater Interfaces. 2013 Dec 26;5(24):13478-83. doi: 10.1021/am405046u. Epub 2013 Dec 13.
Fluorographene, a cousin of graphene, not only inherits the excellent mechanical properties of graphene but also has great unique application potential in high-performance devices and materials, such as lubricating agents, digital transistors, nanocomposites, and energy-storage devices. However, large-scale preparation of fluorographene remains a great challenge. Herein, an easy-operating, highly scalable, and low-cost approach was reported for the preparation of fluorographene using commercially available fluorographite as the starting material. In this procedure, fluorographite turned into few-layer fluorographene through a rapid exfoliation process with Na2O2 and HSO3Cl as exfoliating agents. The whole preparation process was performed in air and without heating, sonication, and protective gas. The obtained fluorographene was characterized by Fourier transform infrared spectroscopy, Raman spectroscopy, (19)F nuclear magnetic resonance spectroscopy, X-ray diffraction, thermogravimetric analysis, atomic force microscopy, and transmission electron microscopy, and it possesses a hexagonal polycrystalline structure. Fluorographene and fluorographite were employed as cathode materials of the primary lithium battery, and it was found that the specific discharge capacity of the battery using fluorographene was improved remarkably compared to that using fluorographite. Cyclic voltammetry results also showed that specific capacitances of fluorographene were dozens of times higher than that of fluorographite. It is clear that electrochemical properties of fluorographene are significantly improved against fluorographite.
氟化石墨烯是石墨烯的一种同素异形体，不仅继承了石墨烯的优异机械性能，而且在高性能器件和材料（如润滑剂、数字晶体管、纳米复合材料和储能器件）中具有巨大的独特应用潜力。然而，大规模制备氟化石墨烯仍然是一个巨大的挑战。在此，我们报道了一种使用商业可得的氟化石墨作为起始原料，通过 Na2O2 和 HSO3Cl 作为剥离剂的快速剥离过程，制备氟化石墨烯的简单、可扩展且低成本的方法。在这个过程中，氟化石墨通过快速剥离过程转化为少层氟化石墨烯。整个制备过程在空气中进行，无需加热、超声和保护气体。所得到的氟化石墨烯通过傅里叶变换红外光谱、拉曼光谱、(19)F 核磁共振光谱、X 射线衍射、热重分析、原子力显微镜和透射电子显微镜进行了表征，它具有六方多晶结构。氟化石墨烯和氟化石墨被用作原锂电池的阴极材料，发现使用氟化石墨烯的电池的比放电容量与使用氟化石墨的电池相比显著提高。循环伏安法结果还表明，氟化石墨烯的比电容是氟化石墨的几十倍。显然，氟化石墨烯的电化学性能相对于氟化石墨有显著的提高。
