Defluorination-assisted heteroatom doping reaction with ammonia gas for synthesis of nitrogen-doped porous graphitized carbon
Defluorination-assisted heteroatom doping reaction with ammonia gas for synthesis of nitrogen-doped porous graphitized carbon
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氨气脱氟辅助杂原子掺杂反应合成氮掺杂多孔石墨化碳
DOI：
10.1016/j.cej.2018.08.016
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发表时间：
2018-12
影响因子：
15.1
通讯作者：
Liu Xiangyang
中科院分区：
文献类型：
--
作者：
Wang Xu;Wang Weimiao;Qin Rui;Xu Dazhou;Li Yulong;Ou Anping;Lai Wenchuan;Liu Yang;Liu Xiangyang
在400 ~ 850 ℃的反应温度下，用氨气掺杂氟化多孔石墨化碳，合成了氮掺杂多孔石墨化碳（N-F-PREGO）。在400 °C合成的N-F-PREGO中，以7.9 at.%的浓度将氮原子引入多孔石墨烯框架中。其中吡啶型、吡啶型和石墨型氮的浓度分别为5.14、1.78和0.99 at。，占总氮种的比例分别为65.0、22.5和12.5%。同时，经过掺杂处理后，材料的原始比表面积为2022 m2/g，并保留了大量的介孔和微孔。在电流密度为1.0 a /g时，掺氮PREGOs的比电容从103 F/g提高到294.2 F/g。在10 A/g时，比电容保持在272.5 F/g，即使在5 A/g下循环10,000次后也保持良好。
Nitrogen-doped porous graphitized carbon (N-F-PREGO) were synthesized by doping the fluorinated porous graphitized carbon with ammonia gas at reaction temperatures of 400–850 °C. In N-F-PREGO synthesized at 400 °C, nitrogen atoms were introduced into the porous graphene framework at a concentration of 7.9 at.%. Among which, the concentrations of the pyridinic-, pyrrolic-, and graphitic-type nitrogen species were 5.14, 1.78, and 0.99 at.%, respectively, and their percentages with respect to the total nitrogen species were 65.0, 22.5, and 12.5%, respectively. Meanwhile, the original specific surface area of 2022 m2/g and abundant meso- and microporous were well-preserved after doping process. Herein, the specific capacitance of the nitrogen-doped PREGOs was improved from 103 F/g to 294.2 F/g at a current density of 1.0 A/g. At 10 A/g, the specific capacitance was reserved at 272.5 F/g, and well retained even after 10,000 cycles at 5 A/g.
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