N-doped ordered mesoporous carbon spheres derived by confined pyrolysis for high supercapacitor performance

查看全文 作　　者：Juan [1]Du;Lei [1]Liu;Yifeng [1]Yu;Yue [1]Zhang;Haijun [1]Lv;Aibing [1]Chen

机构地区：[1]College of Chemical and Pharmaceutical Engineering, Hebei University of Science and Technology

出　　处：《Journal of Materials Science & Technology》索引2019年第35卷第10期,共9页

基　　金：supported financially by the National Natural Science Foundation of China (No. 21676070);the Hebei One Hundred-Excellent Innovative Talent Program (Ⅲ) (No. SLRC2017034);the Beijing National Laboratory for Molecular Sciences, Hebei Province Introduction of Foreign Intelligence Projects (2018) 摘　　要：Herein, we report a confined pyrolysis strategy to prepare mesoporous carbon nanospheres by which surface area of carbon spheres is increased, pore size is enlarged and effective N-doping is achieved. In this method, the mesoporous polymer sphere as carbon precursor and 2-methylimidazole as nitrogen precursor are encapsulated in a compact silica shell which provides a confined nano-space for the pyrolysis treatment. The in situ generated gases from mesoporous polymer sphere and 2-methylimidazole under pyrolysis diffuse into the pores of mesoporous polymer sphere in the confined compact silica shell,resulting in increased surface area, larger pore size and N-doping due to self-activation effect. As electrodes in supercapacitor, the N-doped mesoporous carbon nanospheres exhibit a significantly enhanced specific capacitance of 326 Fg^-1 at 0.5 Ag^-1, which is 2 times higher than that of mesoporous carbon spheres under unconfined pyrolysis condition, exhibiting its potential for electrode materials with high performance. 关键词：CONFINED PYROLYSIS N-DOPING Ordered large mesoporous SPHERES SUPERCAPACITOR

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N-doped ordered mesoporous carbon spheres derived by confined pyrolysis for high supercapacitor performance

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