假电容
杂原子
材料科学
阳极
兴奋剂
碳纳米纤维
化学工程
电化学
介孔材料
超级电容器
纳米纤维
纳米技术
碳纤维
电极
化学
复合材料
碳纳米管
有机化学
光电子学
复合数
催化作用
戒指(化学)
物理化学
工程类
作者
Mulin Yu,Zhoulan Yin,Guochun Yan,Zhixing Wang,Huajun Guo,Guangchao Li,Yong Liu,Lingjun Li,Jiexi Wang
标识
DOI:10.1016/j.jpowsour.2019.227514
摘要
Heteroatoms doping is proved to be an effective strategy to improve the electrochemical performance of carbon materials by adjusting its physical and chemical properties. In this work, sulfur, nitrogen co-doped carbon nanofiber (SNCNF) is prepared by electrospinning technique with the following heat and hydrothermal treatment route. Benefiting from the S, N co-doping, SNCNF demonstrates perfect pseudocapacitance characteristic improving rate performance (N-doping) and large interlayer distances promoting reversible insertion/extraction of Na+ (S-doping). SCNNF displays high charge-discharge specific capacity (290.3 mA h g−1 at 0.1 A g−1), superior cycling stability (247.4 mA h g−1 and 98.2% retention at 0.5 A g−1 over 600 cycles) and ultra-long circulation characteristics at high current rate (160.2 mA h g−1 at 10.0 A g−1 after 10,000 cycles), which can be served as a very promising material as anode for sodium ion batteries.
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