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Branched ultra-fine nickel oxide/manganese dioxide core-shell nanosheet arrays for electrochemical capacitors

机译:用于电化学电容器的支链超细镍氧化物/二氧化锰芯壳纳米阵列

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摘要

We demonstrate the fabrication of ultra-fine hierarchical NiO@MnO2 core-shell nanosheet arrays on carbon fiber paper via a facile and two-step hydrothermal method as the electrode for supercapacitors. Owing to the unique hierarchical core-shell heterostructured nanosheet array configuration and synergetic contribution from the NiO core and MnO2 shell, the as-prepared hybrid nanosheet arrays exhibited a high specific capacitance of 494.8 F g(-1) and good rate capability, which are better than those of the obtained individual component of the NiO nanosheets. More importantly, the asymmetric supercapacitor, composed of NiO@MnO2 core-shell nanosheet arrays as the positive electrode and activated carbon as the negative electrode delivers a specific capacitance of 86.3 F g(-1) and reaches up to an energy density of 30.6 W h kg(-1) and power density of 400 W kg(-1). The improved performance of the NiO@MnO2 core-shell nanosheet arrays demonstrates that rational design of electrode structure is an effective way to fabricate a high-performance electrode for supercapacitors.
机译:我们证明了通过容易和两步水热法作为超级电容器的电极的碳纤维纸上的超细分层NIO @ MNO2核心 - 壳纳米片阵列的制造。由于独特的等级核心外壳异质结构纳米阵列阵列配置和来自NIO核心和MNO2壳的协同贡献,所准备的混合纳清阵列表现出494.8f g(-1)和良好的速率能力的高比电容优于NIO纳米片的所获得的个体组分的优质。更重要的是,由于负极的正极和活性炭,由NIO @ MNO2核心壳纳米片阵列组成的非对称超级电容器作为正极和活性炭,可提供86.3V(-1)的特定电容,并达到30.6W的能量密度。 H kg(-1)和400 w kg(-1)的功率密度。 NIO @ MNO2核心壳纳米片阵列的改进性能表明电极结构的合理设计是制造超级电容器的高性能电极的有效方法。

著录项

  • 来源
    《RSC Advances》 |2015年第94期|共7页
  • 作者单位

    Chongqing Univ Coll Phys Chongqing 400030 Peoples R China;

    Chongqing Univ Coll Chem &

    Chem Engn Chongqing 400030 Peoples R China;

    Chongqing Univ Coll Phys Chongqing 400030 Peoples R China;

    Chongqing Univ Coll Phys Chongqing 400030 Peoples R China;

    Chongqing Univ Coll Phys Chongqing 400030 Peoples R China;

    Chongqing Univ Coll Chem &

    Chem Engn Chongqing 400030 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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