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题名: Vertically Aligned Carbon Nanotubes on Carbon Nanofibers: A Hierarchical Three-Dimensional Carbon Nanostructure for High-Energy Flexible Supercapacitors
作者: Qiu, YC(丘勇才); Li, GZ(李桂珠); Hou, Y(侯远); Pan, ZH; Li, HF(李洪飞); Li, WF(李宛飞); Liu, MN(刘美男); Ye, FM(叶方敏); Yang, XW(杨晓伟); Zhang, YG(张跃刚)
通讯作者: Yang, XW (杨晓伟)
刊名: CHEMISTRY OF MATERIALS
发表日期: 2015
DOI: 10.1021/cm503784x
卷: 27, 期:4, 页:7
收录类别: SCI
部门归属: 纳米研究国际实验室
英文摘要: Hierarchical structures enable high-performance power sources. We report here the preparation of vertically aligned carbon nanotubes directly grown on carbon nanofibers (VACNTs/CNFs) by combining electrospinning with pyrolysis technologies. The structure and morphology of VACNTs/CNFs could be precisely tuned and controlled by adjusting the percentage of reactants. The desired VACNTs/CNFs could not only possess high electric conductivity for efficient charge transport but could also increase surface area for accessing more electrolyte ions. When using an ionic liquid electrolyte, VACNTs/CNFs-based electric double layer (EDL) flexible supercapacitors can deliver a high specific energy of 70.7 Wh/kg at a current density of 0.5 A/g and at 30 degrees C, and an ultrahigh-energy density of 98.8 Wh/kg at a current density of 1.0 A/g and at 60 degrees C. Even after 20 000 charging/discharging cycles, the EDL capacitor still retains 97.0% of the initial capacitance. The excellent performance highlights the important role of the branched VACNTs in storing and accumulating charge and the CNF backbone in transporting charge, thereby boosting both power density and energy density.
语种: 英语
JCR小类分区: 一区
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内容类型: 期刊论文
URI标识: http://ir.sinano.ac.cn/handle/332007/3426
Appears in Collections:纳米研究国际实验室_张跃钢团队_期刊论文

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Recommended Citation:
Qiu, YC,Li, GZ,Hou, Y,et al. Vertically Aligned Carbon Nanotubes on Carbon Nanofibers: A Hierarchical Three-Dimensional Carbon Nanostructure for High-Energy Flexible Supercapacitors[J]. CHEMISTRY OF MATERIALS,2015,27(4):7.
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