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首页> 外文期刊>Advanced energy materials >Core-Shell Aluminum@Carbon Nanospheres for Dual-Ion Batteries with Excellent Cycling Performance under High Rates
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Core-Shell Aluminum@Carbon Nanospheres for Dual-Ion Batteries with Excellent Cycling Performance under High Rates

机译：用于双离子电池的核壳铝@碳纳米球，在高倍率下具有出色的循环性能

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摘要

Dual-ion battery (DIB) has been proposed as a novel energy storage device with the merits of high safety, low cost and environmental friendliness. Herein, we have developed core/shell aluminum@carbon nanospheres (nAl@C) as anode material for DIB. The nanoscale framework is composed of an Al nanosphere and an amorphous carbon outer layer that is conductive and protective, facilitating the formation of a stable SEI film during cycling. Owing to the core-shell structural design, the nAl@C nanospheres demonstrate significantly enhanced electrochemical performance in a nAl@C-graphite DIB. The DIB exhibites high rate performance as well as superior cycling stability with a capacity of 88 mA h g(-1) with 94.6% capacity retention and high Coulombic efficiency (> 99.5%) after 1000 cycles at a high current rate of 15 C. In addition, the nAl@C-G DIB deliveres an ultrahigh specific energy of 148 W h kg(-1) at a high power density of 3701 W kg(-1), which is much better than most commercial lithium-ion batteries.
机译：已经提出了双离子电池（DIB）作为一种新颖的储能装置，其具有高安全性，低成本和环境友好的优点。在此，我们开发了核/壳铝@碳纳米球（nAl @ C）作为DIB的阳极材料。纳米级框架由铝纳米球和无定形碳外层组成，该碳外层具有导电性和保护性，有助于在循环过程中形成稳定的SEI膜。由于核-壳结构设计，nAl @ C纳米球在nAl @ C石墨DIB中显示出显着增强的电化学性能。 DIB表现出高倍率性能以及出色的循环稳定性，在以15 C的高电流速率循环1000次后，容量为88 mA hg（-1），容量保持率为94.6％，库伦效率高（> 99.5％）。此外，nAl @ CG DIB在3701 W kg（-1）的高功率密度下可提供148 W h kg（-1）的超高比能，这比大多数商用锂离子电池要好得多。

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  • 来源
    《Advanced energy materials》 |2018年第6期|1701967.1-1701967.7|共7页
  • 作者

    Tong Xuefeng; Zhang Fan; Chen Guanghai; Liu Xinyu; Gu Lin; Tang Yongbing;

  • 作者单位

    Shenzhen Inst Adv Technol, Chinese Acad Sci, Funct Thin Films Res Ctr, Shenzhen 518055, Peoples R China;

    Shenzhen Inst Adv Technol, Chinese Acad Sci, Funct Thin Films Res Ctr, Shenzhen 518055, Peoples R China;

    Shenzhen Inst Adv Technol, Chinese Acad Sci, Funct Thin Films Res Ctr, Shenzhen 518055, Peoples R China;

    Inst Phys, Chinese Acad Sci, POB 603, Beijing 100190, Peoples R China;

    Inst Phys, Chinese Acad Sci, POB 603, Beijing 100190, Peoples R China;

    Shenzhen Inst Adv Technol, Chinese Acad Sci, Funct Thin Films Res Ctr, Shenzhen 518055, Peoples R China;

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  • 正文语种 eng
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  • 关键词

    aluminum@carbon nanospheres; anion intercalation; anode; dual-ion batteries;

    机译：铝@碳纳米球;阴离子嵌入;阳极;双离子电池;

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