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首页> 外文期刊>RSC Advances >CuO nanorods grown vertically on graphene nanosheets as a battery-type material for high-performance supercapacitor electrodes
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CuO nanorods grown vertically on graphene nanosheets as a battery-type material for high-performance supercapacitor electrodes

机译：CuO纳米棒在石墨烯纳米片上垂直生长，作为用于高性能超级电容电极的电池型材料

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摘要

This work reports the preparation and characterization of the CuO nanorods grown vertically on graphene nanosheets, denoted as CuO/rGO@NF. Graphene is deposited by electrostatic attraction showing the morphology of folded nanosheets, which improves the electrical conductivity of the electrode, while CuO is modified by filtered cathodic vacuum arc technology and subsequent electrochemical oxidation presenting the morphology of nanorods, which increases the contact area of active sites and shortens the ion and electronic diffusion path. The results show that the CuO/rGO@NF electrode deliver an ultrahigh specific capacity (2.51 C cm(-2)at 2 mA cm(-2)), remarkable rate performance (64.6%) and improved conductivity. A symmetrical supercapacitor is assembled by two identical electrodes, presenting the maximum energy density of 38.35 W h kg(-1)at a power density of 187.5 W kg(-1). Therefore, the CuO/rGO@NF electrode can be used as a prospective electrode for energy storage devices. In addition, the whole electrode preparation process is short in time, safe and environmentally friendly, which provides a new idea for the preparation of other electrode materials.
机译：该工作报告了在石墨烯纳米片上垂直生长的CuO纳米棒的制备和表征，表示为CuO / Rgo @ NF。通过静电吸引沉积石墨烯，显示折叠纳米片的形态，这提高了电极的电导率，而CuO通过过滤的阴极真空电弧技术和随后的电化学氧化呈现纳米棒的形态，这增加了活性位点的接触面积并缩短离子和电子扩散路径。结果表明，CUO / RGO @ NF电极在2 mA cm（-2））的超高特定容量（2.51c cm（-2）），显着的速率性能（64.6％）和改善的电导率。对称超电容器由两个相同的电极组装，呈现在187.5Wkg（-1）的功率密度的38.35WH kg（-1）的最大能量密度。因此，CUO / RGO @ NF电极可以用作能量存储装置的预期电极。此外，整个电极制备过程的时间短，安全和环保，为制备其他电极材料提供了新的思路。

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  • 来源
    《RSC Advances》 |2020年第60期|共8页
  • 作者

    Zhai Miaomiao; Li Ang; Hu Jingbo;

  • 作者单位

    Beijing Normal Univ Dept Chem Beijing 100875 Peoples R China;

    Beijing Normal Univ Dept Chem Beijing 100875 Peoples R China;

    Beijing Normal Univ Dept Chem Beijing 100875 Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
  • 关键词

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