【作者】 赵福刚； 赵刚； 刘新华； 王启刚； 李维实； 陈庆云；

【Author】 Fu-Gang Zhao;Gang Zhao;Xin-Hua Liu;Qi-Gang Wang;Wei-Shi Li;Qing-Yun Chen;Shanghai Institute of Organic Chemistry,Chinese Academy of Sciences;Department of Chemistry,Tongji University;

【机构】 中国科学院上海有机化学研究所； 同济大学化学系；

【摘要】 氟化石墨烯(Fluorinated Graphene,FG),即氟原子共价连接到石墨烯片层上,是一种重要的新型石墨烯衍生物1。它不但保留了石墨烯独特的二维结构,又由于氟原子的引入,使其具有一些不同于石墨烯的优异性能。然而,如何实现在温和条件下大规模制备且氟含量可调控的氟化石墨烯,尚未有切实可行的方法。我们设想如果能将氧化石墨烯中的含氧官能团通过化学反应转化为含氟基团,不失为一种制备氟化石墨烯简单可行的方法。我们实验发现,二乙胺基三氟化硫(DAST)在室温下可以高效地将氧化石墨烯中的C-O基团转化为C-F基团,且氟化石墨烯的含氟量可以通过改变反应介质进行调控(Fig.1)。含氟量的不同使氟化石墨烯具有不同的带隙和电学性能。初步将其用作全固态超级电容器的电极材料,呈现中等水平的比电容和较优异的稳定性。更多还原

【Abstract】 Fluorinated graphene, as one of new and important graphene derivatives, possesses a similar two-dimensional structure like graphene, and outstanding but different properties from graphene due to the covalent fluorination on the carbon nanosheets. However, for its massive preparation with controlled F-loading amount under mild conditions, it still lacks of a feasible way and remains a big challenge in the field. We envisioned that GO would be a promising starting material for feasible preparation of fluorinated graphene if the oxygen-containing functionalities can be effectively transformed into C-F moieties. We finally found that diethylaminosulfurtrifluoride(DAST) is efficient for such chemical transformations and thus convert GO to FG under ambient conditions. Of interest, the fluorine loading amount can be easily tuned just by simply changing the reaction medium, affording tailorable band gap and electronic properties. Preliminary experiments on their application as electrode materials for all solid-state supercapacitors showed a moderate specific capacitance and excellent cycling stability.更多还原