文献类型：期刊文献

英文题名：Nitrogen-doped hierarchical porous carbon microsphere through KOH activation for supercapacitors

作者：Jiang, Jingui[1];Chen, Hao[1];Wang, Zhao[1];Bao, Luke[1];Qiang, Yiwei[1];Guan, Shiyou[1];Chen, Jianding[1]

机构：[1]E China Univ Sci & Technol, Sch Mat Sci & Engn, Shanghai 200237, Peoples R China

年份：2015

卷号：452

起止页码：54

外文期刊名：JOURNAL OF COLLOID AND INTERFACE SCIENCE

收录：;EI(收录号：20151700795130);WOS:【SCI-EXPANDED(收录号:WOS:000355068900009)】；

基金：The authors are grateful for the financial support from National Natural Science Foundation of China (No. 21274043).

语种：英文

外文关键词：Activation; Nitrogen-doping; Porous carbon microsphere; Supercapacitors; Synergy

摘要：A porous carbon microsphere with moderate specific surface area and superior specific capacitance for supercapacitors is fabricated from polyphosphazene microsphere as the single heteroatoms source by the carbonization and subsequent KOH activation under N-2 atmosphere. With KOH activation, X-ray photoelectron spectroscopy analysis confirms that the phosphorus of polyphosphazene microsphere totally vanishes, and the doping content of nitrogen and its population of various functionalities on porous carbon microsphere surface are tuned. Compared with non-porous carbon microsphere, the texture property of the resultant porous carbon microsphere subjected to KOH activation has been remarkably developed with the specific surface area growing from 315 to 1341 m(2) gland the pore volume turning from 0.17 to 0.69 cm(3) g(-1). Prepared with the KOH/non-porous carbon microsphere weight ratio at 1.0, the porous carbon microsphere with moderate specific surface area of 568 m(2) g(-1), exhibits intriguing electrochemical behavior in I M H2SO4 aqueous electrolyte, with superior specific capacitance (278 F g(-1) at 0.1 A g(-1)), good rate capability (147 F g(-1) remained at 10 A g(-1)) and robust cycling durability (No capacitance loss after 5000 cycles). The promising electrochemical performance could be ascribed to the synergy of nitrogen heteroatom functionalities and the porous morphology. (C) 2015 Elsevier Inc. All rights reserved.