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首页> 外文期刊>Advanced Functional Materials >Three-Dimensional Co_3O_4@MnO_2 Hierarchical Nanoneedle Arrays: Morphology Control and Electrochemical Energy Storage
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Three-Dimensional Co_3O_4@MnO_2 Hierarchical Nanoneedle Arrays: Morphology Control and Electrochemical Energy Storage

机译：三维Co_3O_4 @ MnO_2多层纳米针阵列：形态控制和电化学储能

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摘要

In this paper, a highly ordered three-dimensional Co_3O_4@MnO_2 hierarchical porous nanoneedle array on nickel foam is fabricated by a facile, stepwise hydrothermal approach. The morphologies evolution of Co_3O_4 and Co_3O_4@MnO_2 nanostructures upon reaction times and growth temperature are investigated in detail. Moreover, the as-prepared Co_3O_4@MnO_2 hierarchical structures are investigated as anodes for both supercapacitors and Li-ion batteries. When used for supercapacitors, excellent electrochemical performances such as high specific capacitances of 932.8 F g~(-1) at a scan rate of 10 mV s~(-1) and 1693.2 F g~(-1) at a current density of 1 A g~(-1) as well as long-term cycling stability and high energy density (66.2 W h kg~(-1) at a power density of 0.25 kW kg~(-1)), which are better than that of the individual component of Co_3O_4 nanoneedles and MnO_2 nanosheets, are obtained. The Co_3O_4@MnO_2 NAs are also tested as anode material for LIBs for the first time, which presents an improved performance with high reversible capacity of 1060 mA h g~(-1) at a rate of 120 mA g~(-1), good cycling stability, and rate capability.
机译：本文通过一种简便的，逐步的水热方法，在泡沫镍上制备了高度有序的三维Co_3O_4 @ MnO_2分层多孔纳米针阵列。详细研究了Co_3O_4和Co_3O_4 @ MnO_2纳米结构随反应时间和生长温度的形貌演变。此外，研究了所制备的Co_3O_4 @ MnO_2分层结构作为超级电容器和锂离子电池的阳极。当用于超级电容器时，具有出色的电化学性能，例如在10 mV s〜（-1）的扫描速率和电流密度1下的1693.2 F g〜（-1）的高比电容为932.8 F g〜（-1）。 a g〜（-1）以及长期循环稳定性和高能量密度（功率密度为0.25 kW kg〜（-1）时为66.2 W h kg〜（-1）），优于得到了Co_3O_4纳米针和MnO_2纳米片的各个组分。 Co_3O_4 @ MnO_2 NAs也首次作为LIBs的阳极材料进行了测试，以120mA g〜（-1）的速率可逆容量为1060 mA hg〜（-1），具有改进的性能。循环稳定性和速率能力。

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  • 来源
    《Advanced Functional Materials》 |2014年第24期|3815-3826|共12页
  • 作者

    Dezhi Kong; Jingshan Luo; Yanlong Wang; Weina Ren; Ting Yu; Yongsong Luo; Yaping Yang; Chuanwei Cheng;

  • 作者单位

    Shanghai Key Laboratory of Special Artificial Microstructure Materials and Technology School of Physics Science and Engineering Tongji University Shanghai 200092, P. R. China;

    Division of Physics and Applied Physics School of Physical and Mathematical Sciences Nanyang Technological University 637371, Singapore;

    Division of Physics and Applied Physics School of Physical and Mathematical Sciences Nanyang Technological University 637371, Singapore;

    Shanghai Key Laboratory of Special Artificial Microstructure Materials and Technology School of Physics Science and Engineering Tongji University Shanghai 200092, P. R. China;

    Division of Physics and Applied Physics School of Physical and Mathematical Sciences Nanyang Technological University 637371, Singapore;

    Department of Physics &. Electronic Engineering Xinyang Normal University Xinyang 464000, P. R. China;

    Shanghai Key Laboratory of Special Artificial Microstructure Materials and Technology School of Physics Science and Engineering Tongji University Shanghai 200092, P. R. China;

    Shanghai Key Laboratory of Special Artificial Microstructure Materials and Technology School of Physics Science and Engineering Tongji University Shanghai 200092, P. R. China;

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