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首页> 外文期刊>Advanced Functional Materials >In Situ Preparation of Sandwich MoO_3/C Hybrid Nanostructures for High-Rate and Ultralong-Life Supercapacitors
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In Situ Preparation of Sandwich MoO_3/C Hybrid Nanostructures for High-Rate and Ultralong-Life Supercapacitors

机译：用于高速率和超长寿命超级电容器的三明治式MoO_3 / C混合纳米结构的原位制备

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摘要

This work presents a design of sandwich MoO_3/C hybrid nanostructure via calcination of the dodecylamine-intercalated layered α-MoO_3, leading to the in situ production of the interlayered graphene layer. The sample with a high degree of graphitization of graphene layer and more interlayered void region exhibits the most outstanding energy storage performance. The obtained material is capable of delivering a high specific capacitance of 331 F g~(-1) at a current density of 1 A g~(-1) and retained 71% capacitance at 10 A g~(-1). In addition, nearly no discharge capacity decay between 1000 and 10 000 continuous charge-discharge cycles is observed at a high current density of 10 A g~(-1), indicating an excellent specific capacitance retention ability. The exceptional rate capability endows the electrode with a high energy density of 41.2 W h kg~(-1) and a high power density of 12.0 kW kg~(-1) simultaneously. The excellent performance is attributed to the sandwich hybrid nanostructure of MoO_3/C with broad ion diffusion pathway, low charge-transfer resistance, and robust structure at high current density for long-time cycling. The present work provides an insight into the fabrication of novel electrode materials with both enhanced rate capability and cyclability for potential use in supercapacitor and other energy storage devices.
机译：这项工作提出了一种设计，通过煅烧十二烷基胺插层的α-MoO_3来制备夹心MoO_3 / C杂化纳米结构，从而就地产生层间石墨烯层。具有高度石墨化程度的石墨烯层和更多层间空隙区域的样品表现出最杰出的能量存储性能。所获得的材料能够在1 A g〜（-1）的电流密度下提供331 F g〜（-1）的高比电容，并在10 A g〜（-1）时保持71％的电容。此外，在10 A g〜（-1）的高电流密度下，在1000至10000个连续充放电循环之间几乎没有观察到放电容量衰减，表明其优异的比电容保持能力。出色的倍率性能使电极同时具有41.2 W h kg〜（-1）的高能量密度和12.0 kW kg〜（-1）的高功率密度。优异的性能归因于MoO_3 / C的夹杂杂化纳米结构，具有宽的离子扩散途径，低的电荷转移电阻以及在高电流密度下可长时间循环使用的坚固结构。本工作提供了对新型电极材料的制造的见解，该新型电极材料具有增强的倍率能力和可循环性，可用于超级电容器和其他储能设备。

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  • 来源
    《Advanced Functional Materials》 |2015年第12期|1886-1894|共9页
  • 作者

    Hongmei Ji; Xiaolin Liu; Zhijuan Liu; Bo Yan; Lin Chen; Yafeng Xie; Chao Liu; Wenhua Hou; Gang Yang;

  • 作者单位

    Key Laboratory of Mesoscopic Chemistry of MOE School of Chemistry and Chemical Engineering Nanjing University Nanjing 210093, P.R.China,Jiangsu Laboratory of Advanced Functional Materials Department of Chemistry, Changshu Institute of Technology Changshu 215500, P.R. China;

    Key Laboratory of Mesoscopic Chemistry of MOE School of Chemistry and Chemical Engineering Nanjing University Nanjing 210093, P.R.China;

    Jiangsu Laboratory of Advanced Functional Materials Department of Chemistry, Changshu Institute of Technology Changshu 215500, P.R. China;

    Jiangsu Laboratory of Advanced Functional Materials Department of Chemistry, Changshu Institute of Technology Changshu 215500, P.R. China;

    Jiangsu Laboratory of Advanced Functional Materials Department of Chemistry, Changshu Institute of Technology Changshu 215500, P.R. China;

    Jiangsu Laboratory of Advanced Functional Materials Department of Chemistry, Changshu Institute of Technology Changshu 215500, P.R. China;

    Key Laboratory of Mesoscopic Chemistry of MOE School of Chemistry and Chemical Engineering Nanjing University Nanjing 210093, P.R.China;

    Key Laboratory of Mesoscopic Chemistry of MOE School of Chemistry and Chemical Engineering Nanjing University Nanjing 210093, P.R.China;

    Jiangsu Laboratory of Advanced Functional Materials Department of Chemistry, Changshu Institute of Technology Changshu 215500, P.R. China;

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