Nitrogen and oxygen co-doped carbon nanofibers with rich sub-nanoscale pores as self-supported electrode material of high-performance supercapacitors

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• 作者：Qun Li¹ ; Wenhe Xie¹ ; Dequan Liu ; Qi Wang ; Deyan He ; ^{hedy@lzu.edu.cn}
• 关键词：Porous carbon nanofibers ; N ; O co-doping ; Sub-nanoscale pores ; Electrode material ; Supercapacitors
• 刊名：Electrochimica Acta
• 出版年：2016
• 出版时间：20 December 2016
• 年：2016
• 卷：222
• 期：Complete
• 页码：1445-1454
• 全文大小：4454 K
• 卷排序：222

文摘

Self-supported porous carbon nanofibers (CNFs) network has been prepared by electrospinning technology assisted with template method. The as-prepared material is rich in sub-nanoscale pores and nitrogen and oxygen functional groups, which can serve as a fast conductive network with abundant electrochemical active sites and greatly facilitates the transport of electrons and ions. When the porous CNFs network is used as an electrode for supercapacitor in a three electrode system, it displays a high capacitance of 233.1 F/g at 0.2 A/g, and a capacitance of 130.2 F/g even at 14 A/g. It maintains a capacitance of 154.0 F/g with 90.17% retention after 4000 cycles at 2 A/g. Moreover, the assembled symmetric supercapacitor not only exhibits excellent rate capability and cycle performance, but also delivers an energy density of 4.17 Wh/kg and a power density of 2500 W/kg. The experimental results demonstrate that the prepared N, O co-doped carbon nanofibers with rich sub-nanoscale pores are a promising electrode material for high-performance supercapacitors.