Graphene/vanadium oxide nanotubes composite as electrode material for electrochemical capacitors

作者：Fu, Meimei; Ge, Chongyong; Hou, Zhaohui^*; Cao, Jianguo; He, Binhong; Zeng, Fanyan; Kuang, Yafei

来源：Physica B: Condensed Matter , 2013, 421: 77-82.

DOI：10.1016/j.physb.2013.04.013

• Graphene
• Vanadium oxide nanotubes
• Electrochemical capacitor
• Hydrothermal

Graphene/vanadium oxide nanotubes (VOx-NTs) composite was successfully synthesized through the hydrothermal process in which acetone as solvent and 1-hexadecylamine (HDA) as structure-directing template were used. Morphology, structure and composition of the as-obtained composite were investigated by scanning electron microscopy (SEM), X-ray diffraction (XRD), Raman spectroscopy, nitrogen isothermal adsorption/desorption and thermo gravimetric analysis (TGA). The composite with the VOx-NTs amount of 69.0 wt% can deliver a specific capacitance of 210 F/g at a current density of 1 A/g in 1 M Na2SO4 aqueous solution, which is nearly twice as that of pristine graphene (128 Fig) or VOx-NTs (127 Fig), and exhibit a good performance rate. Compared with pure VOx-NTs, the cycle stability of the composite was also greatly improved due to the enhanced conductivity of the electrode and the structure buffer role of graphene.

• 出版日期2013-7-15
• 单位湘潭大学; 湖南大学