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首页> 外文期刊>Applied Surface Science >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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Facile synthesis of high-surface vanadium nitride/vanadium sesquioxide/ amorphous carbon composite with porous structures as electrode materials for high performance symmetric supercapacitors

机译：高效合成具有多孔结构的高表面氮化钒/三氧化二钒/无定形碳复合材料作为高性能对称超级电容器的电极材料

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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.
机译：以偏钒酸铵和葡萄糖为原料，结合煅烧工艺，通过简便的水热法成功合成了氮化钒/三氧化二钒/非晶碳（表示为VN / V2O3 / C）复合材料。结果表明，VN / V2O3纳米颗粒（主VN和次要V2O3）高度分散在部分石墨化的无定形碳上。 VN / V2O3 / C复合材料具有介孔结构，BET比表面积为134 m（2）.g（-1），孔体积为0.180 cm（3）.g（-1）。通过循环伏安法（CV），恒电流充放电（GCD）和电化学阻抗谱（ESI）研究了VN / V2O3 / C复合材料的电化学性能。 VN / V2O3 / C复合电极表现出令人满意的电化学性能，在5 mV.s（-1）时的比电容为169 Fg（-1）（在0.5 Ag（-1）时的比电容为138 Fg（-1））和循环行为4000次循环后为99.4％。此外，组装了VN / V2O3 / C对称超级电容器（表示为VN / V2O3 / C SSC）器件以评估其实际应用。 VN / V2O3 / C SSC装置具有出色的电化学性能，在5 mV.s（-1）和82 mF.cm（-2）时的面积电容为129 mF.cm（-2）（16.2 Fg（-1）） ）（0.5 mA.cm（-2）时为（10.3 Fg（-1）），2000次循环后循环稳定性为87％，能量密度为92 mWh.m（-2）（1.55 Whkg（-1））功率密度为2.25 Wm（-2）（14 W.kg（-1））。这项工作中令人印象深刻的发现表明，VN / V2O3 / C复合材料可被视为高性能储能材料的有希望的候选者。

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  • 来源
    《Applied Surface Science》 |2019年第31期|842-851|共10页
  • 作者

    Zhang Yifu; Wang Xiaofei; Zheng Jiqi; Hu Tao; Liu Xin; Meng Changgong;

  • 作者单位

    Dalian Univ Technol, Fac Chem Environm & Biol Sci & Technol, Sch Chem, Dalian 116024, Peoples R China;

    Dalian Univ Technol, Fac Chem Environm & Biol Sci & Technol, Sch Chem, Dalian 116024, Peoples R China;

    Dalian Univ Technol, Fac Chem Environm & Biol Sci & Technol, Sch Chem, Dalian 116024, Peoples R China;

    Dalian Univ Technol, Fac Chem Environm & Biol Sci & Technol, Sch Chem, Dalian 116024, Peoples R China;

    Dalian Univ Technol, Fac Chem Environm & Biol Sci & Technol, Sch Chem, Dalian 116024, Peoples R China;

    Dalian Univ Technol, Fac Chem Environm & Biol Sci & Technol, Sch Chem, Dalian 116024, Peoples R China;

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  • 正文语种 eng
  • 中图分类
  • 关键词

    VN/V2O3/C composite; Amorphous carbon; Electrode materials; Electrochemical properties; Symmetric supercapacitor; Device;

    机译：VN / V2O3 / C复合材料;非晶碳;电极材料;电化学性能;对称超级电容器;器件;

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