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首页> 外文期刊>RSC Advances >Performance enhancement of asymmetric supercapacitors with bud-like Cu-doped Mn3O4 hollow and porous structures on nickel foam as positive electrodes
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Performance enhancement of asymmetric supercapacitors with bud-like Cu-doped Mn3O4 hollow and porous structures on nickel foam as positive electrodes

机译：用芽状Cu掺杂Mn3O4中空结构和镍泡沫镍泡沫的非对称超级电容器的性能提高为正电极

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摘要

Cu-doped Mn3O4 hollow nanostructures supported on Ni foams as high-performance electrode materials for supercapacitors were successfully synthesized through a facile hydrothermal method and subsequent calcination. The morphology, structure, and electrochemical performance of the as-prepared Mn3O4 nanostructures can be tuned just by varying the Cu doping content. Benefiting from the unique bud-like hollow structure, the 1.5 at% Cu-doped Mn3O4 sample has a high specific capacitance of 257.6 F g(-1) at 1 A g(-1) and remarkable stability (about 90.6% retention of its initial capacitance after 6000 electrochemical cycles). Besides, an asymmetric supercapacitor (ASC) cell based on the 1.5 at% Cu-doped Mn3O4 exhibits a high specific capacitance of 305.6 F g(-1) at 1 A g(-1) and an energy density of 108.6 W h kg(-1) at a power density of 799.9 W kg(-1). More importantly, the ASC shows good long-term stability with 86.9% capacity retention after charging/discharging for 6000 cycles at a high current density of 5 A g(-1).
机译：通过容易的水热法和随后的煅烧成功地合成了Ni泡沫作为超级电容器的高性能电极材料的Cu掺杂Mn3O4中空纳米结构。可以通过改变Cu掺杂含量来调谐AS制备的Mn3O4纳米结构的形态，结构和电化学性能。受益于独特的芽状中空结构，1.5个在％Cu掺杂的Mn3O4样品中具有257.6fg（-1）的高比电容，1 a g（-1），稳定性（其保留约90.6％） 6000电化学循环后的初始电容）。此外，基于1.5处的1.5掺杂Mn3O4的不对称超级涂物（ASC）电池在1Ag（-1）的高度比电容为305.6fg（-1）和108.6Wh kg的能量密度（ -1）功率密度为799.9 W kg（-1）。更重要的是，ASC显示出在充电/放电6000次循环后的86.9％容量保持良好的长期稳定性，以5Ag（-1）的高电流密度。

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  • 来源
    《RSC Advances》 |2018年第63期|共10页
  • 作者

    Chen Xiaobo; Chen Cheng; Xu Tianzhi; Xu Yingjie; Liu Weiwei; Yang Wen; Yang Peizhi;

  • 作者单位

    Yancheng Teachers Univ Sch New Energy &

    Elect Engn Yancheng 224051 Peoples R China;

    Yancheng Teachers Univ Sch New Energy &

    Elect Engn Yancheng 224051 Peoples R China;

    Yancheng Teachers Univ Sch New Energy &

    Elect Engn Yancheng 224051 Peoples R China;

    Yancheng Teachers Univ Sch New Energy &

    Elect Engn Yancheng 224051 Peoples R China;

    Yancheng Teachers Univ Sch New Energy &

    Elect Engn Yancheng 224051 Peoples R China;

    Yunnan Normal Univ Educ Minist Adv Tech &

    Preparat Renewable Energy Key Lab Kunming 650500 Yunnan Peoples R China;

    Yunnan Normal Univ Educ Minist Adv Tech &

    Preparat Renewable Energy Key Lab Kunming 650500 Yunnan Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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