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  • 刘新 ( 副教授 )

    的个人主页 http://faculty.dlut.edu.cn/xliu/zh_CN/index.htm

  •   副教授   博士生导师   硕士生导师
论文成果 当前位置: 中文主页 >> 科学研究 >> 论文成果
Facile synthesis of high-surface vanadium nitride/vanadium sesquioxide/amorphous carbon composite with porous structures as electrode materials for high performance symmetric supercapacitors

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论文类型:期刊论文
第一作者:Zhang, Yifu
通讯作者:Zhang, YF (reprint author), Dalian Univ Technol, Fac Chem Environm & Biol Sci & Technol, Sch Chem, Dalian 116024, Peoples R China.
合写作者:Wang, Xiaofei,Zheng, Jiqi,Hu, Tao,Liu, Xin,Meng, Changgong
发表时间:2019-03-31
发表刊物:APPLIED SURFACE SCIENCE
收录刊物:SCIE、Scopus
卷号:471
页面范围:842-851
ISSN号:0169-4332
关键字:VN/V2O3/C composite; Amorphous carbon; Electrode materials; Electrochemical properties; Symmetric supercapacitor; Device
摘要:Vanadium nitride/vanadium sesquioxide/amorphous carbon (denoted as VN/V2O3/C) composite is successfully synthesized by a facile hydrothermal method using ammonium metavanadate and glucose as the starting materials combined with a calcination process. Results show that VN/V2O3 nanoparticles (main VN and minor V2O3) are highly scattered on the amorphous carbon which is partly graphitized. VN/V2O3/C composite possesses the mesoporous structure with BET specific surface area of 134 m(2).g(-1), and the pore volume of 0.180 cm(3).g(-1). Electrochemical properties of VN/V2O3/C composite are investigated by cyclic voltammetry (CV), galvanostatic charge-discharge (GCD) and electrochemical impedance spectroscopy (ESI). VN/V2O3/C composite electrode exhibits the satisfied electrochemical properties with the specific capacitance of 169 F.g(-1) at 5 mV.s(-1) (138 F.g(-1) at 0.5 A.g(-1)) and cycling behavior of 99.4% after 4000 cycles. Furthermore, VN/V2O3/C symmetric supercapacitor (denoted as VN/V2O3/C SSC) devices are assembled to assess their practical application. VN/V2O3/C SSC device exhibits the excellent electrochemical performance with the areal capacitance of 129 mF.cm(-2) (16.2 F.g(-1)) at 5 mV.s(-1) and 82 mF.cm(-2) (10.3 F.g(-1)) at 0.5 mA.cm(-2), cycling stability of 87% after 2000 cycles, and the energy density of 92 mWh.m(-2) (1.55 W.h.kg(-1)) at the power density of 2.25 W.m(-2) (14 W.kg(-1)). The impressive finding in this work demonstrates that the VN/V2O3/C composite can be considered as a promising candidate for high-performance energy storage materials.

 

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