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首页> 外文期刊>Advanced Functional Materials >Flexible Films Derived from Electrospun Carbon Nanofibers Incorporated with Co_3O_4 Hollow　Nanoparticles as Self-Supported Electrodes for Electrochemical Capacitors
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Flexible Films Derived from Electrospun Carbon Nanofibers Incorporated with Co_3O_4 Hollow　Nanoparticles as Self-Supported Electrodes for Electrochemical Capacitors

机译：静电纺成的碳纳米纤维制成的柔性膜，其中掺有Co_3O_4空心纳米粒子作为电化学电容器的自支撑电极

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摘要

Flexible porous films are prepared from electrospun carbon nanofibers (CNFs) embedded with Co_3O_4 hollow nanoparticles (NPs) and are directly applied as self-supported electrodes for high-performance electrochemical capacitors. Uniform Co_3O_4 hollow NPs are well dispersed and/or embedded into each CNF with desirable electrical conductivity. These Co_3O_4-CNFs intercross each other and form 3D hierarchical porous hybrid films. Benefiting from intriguing structural features, the unique binder-free Co_3O_4 hollow NPs/ CNF hybrid film electrodes exhibit high specific capacitance (SC), excellent rate capability and cycling stability. As an example, the flexible hybrid film with loading of 35.9 wt% Co_3O_4 delivers a SC of 556 F g~(-1) at a current density of 1 A g~(-1), and 403 F g~(-1) even at a very high current density of 12 A g~(-1). Remarkably, almost no decay in SC is found after continuous charge/discharge cycling for 2000 cycles at 4 A g~(-1). This exceptional electrochemical performance makes such novel self-supported Co_3O_4-CNFs hybrid films attractive for high-performance electrochemical capacitors.
机译：柔性多孔膜由嵌入有Co_3O_4中空纳米颗粒（NP）的电纺碳纳米纤维（CNF）制成，并直接用作自支撑电极，用于高性能电化学电容器。均匀的Co_3O_4空心NP具有理想的导电性，可以很好地分散和/或嵌入每个CNF中。这些Co_3O_4-CNF彼此交叉并形成3D分层多孔杂化膜。得益于迷人的结构特征，独特的无粘结剂Co_3O_4空心NPs / CNF混合膜电极表现出高的比电容（SC），出色的倍率性能和循环稳定性。例如，负载量为35.9 wt％Co_3O_4的柔性杂化膜在1 A g〜（-1）和403 F g〜（-1）的电流密度下提供556 F g〜（-1）的SC。即使在12 A g〜（-1）的极高电流密度下也是如此。值得注意的是，在4 A g〜（-1）下连续充电/放电2000次后，SC几乎没有衰减。这种出色的电化学性能使这种新型的自支撑Co_3O_4-CNFs杂化膜对高性能电化学电容器具有吸引力。

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  • 来源
    《Advanced Functional Materials》 |2013年第31期|3909-3915|共7页
  • 作者

    Fang Zhang; Changzhou Yuan; Jiajia Zhu; Jie Wang; Xiaogang Zhang; Xiong Wen (David) Lou;

  • 作者单位

    College of Material Science & Engineering Nanjing University of Aeronautics and Astronautics Nanjing, 210016, P. R. China;

    School of Chemical and Biomedical Engineering Nanyang Technological University 62 Nanyang Drive, Singapore 637459;

    College of Material Science & Engineering Nanjing University of Aeronautics and Astronautics Nanjing, 210016, P. R. China;

    College of Material Science & Engineering Nanjing University of Aeronautics and Astronautics Nanjing, 210016, P. R. China;

    College of Material Science & Engineering Nanjing University of Aeronautics and Astronautics Nanjing, 210016, P. R. China;

    School of Chemical and Biomedical Engineering Nanyang Technological University 62 Nanyang Drive, Singapore 637459;

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