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首页> 外文期刊>Advanced energy materials >Tailored Plum Pudding-Like Co_2P/Sn Encapsulated with Carbon Nanobox Shell as Superior Anode Materials for High-Performance Sodium-Ion Capacitors
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Tailored Plum Pudding-Like Co_2P/Sn Encapsulated with Carbon Nanobox Shell as Superior Anode Materials for High-Performance Sodium-Ion Capacitors

机译：用碳纳米框壳体封装的量身定制的李子布丁Co_2P / Sn作为高性能钠离子电容器的优质阳极材料

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摘要

Sodium-ion capacitors (SICs) are emerging energy storage devices with high energy, high power, and durable life. Sn is a promising anode material for lithium storage, but the poor conductivity of the a-NaSn phase upon sodaition hinders its implementation in SICs. Herein, a superior Sn-based anode material consisting of plum pudding-like Co2P/Sn yolk encapsulated with nitrogen-doped carbon nanobox (Co2P/Sn@NC) for high-performance SICs is reported. The 8-10 nm metallic nanoparticles produced in situ are uniformly dispersed in the amorphous Sn matrix serving as conductive fillers to facilitate electron transfer in spite of the formation of electrically resistive a-NaSn phase during cycling. Meanwhile, the carbon shell buffers the large expansion of active Sn and provides a stable electrode-electrolyte interface. Owing to these merits, the yolk-shell Co2P/Sn@NC demonstrates a large capacity of 394 mA h g(-1) at 100 mA g(-1), high rate capability of 168 mA h g(-1) at 5000 mA g(-1), and excellent cyclability with 87% capacity retention after 10 000 cycles. By integrating the Co2P/Sn@NC anode with a peanut shell-derived carbon cathode in the SIC, high energy densities of 112.3 and 43.7 Wh kg(-1) at power densities of 100 and 10 000 W kg(-1) are achieved.
机译：钠离子电容器（SICS）是具有高能量，高功率和耐用寿命的能量存储装置。 SN是锂储存的有前途的阳极材料，但A-NASN阶段对SOODAition阶段的差的导电性阻碍了其在SICS中的实施。这里，报道了一种用于高性能SICS的含有氮掺杂碳纳米氧氧化（CO2P / SN @ NC）的李子布丁状CO 2P / Sn蛋黄组成的优质Sn基阳极材料。原位生产的8-10nm金属纳米颗粒均匀地分散在用作导电填料的无定形Sn基质中，以便于在循环期间形成电阻A-NASN相。同时，碳壳缓冲有源Sn的大膨胀，并提供稳定的电极 - 电解质界面。由于这些优点，Yolk-shell Co2P / Sn @ NC在100mA g（-1），168 mA Hg（-1）的高速能力为5000 mA g，表现出大容量的394 mA hg（-1）， （-1），10 000次循环后的87％容量保留，优异的可循环性。通过将CO 2P / Sn @ NC阳极与花生壳衍生的碳阴极相积分，实现了100％和10 000W kg（-1）的112.3和43.7WHKG（-1）的高能密度。

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  • 来源
    《Advanced energy materials》 |2019年第16期|1900091.1-1900091.10|共10页
  • 作者

    Ren Xiaochuan; Ren Zhiguo; Li Qingwei; Wen Wen; Li Xiaofang; Chen Ye; Xie Lei; Zhang Liao; Zhu Daming; Gao Biao; Chu Paul K.; Huo Kaifu;

  • 作者单位

    Huazhong Univ Sci & Technol WNLO Luoyu Rd 1037 Wuhan 430074 Hubei Peoples R China;

    Huazhong Univ Sci & Technol WNLO Luoyu Rd 1037 Wuhan 430074 Hubei Peoples R China;

    Huazhong Univ Sci & Technol WNLO Luoyu Rd 1037 Wuhan 430074 Hubei Peoples R China;

    Chinese Acad Sci Shanghai Synchrotron Radiat Facil Shanghai Adv Res Inst Shanghai 201204 Peoples R China;

    Huazhong Univ Sci & Technol WNLO Luoyu Rd 1037 Wuhan 430074 Hubei Peoples R China;

    Huazhong Univ Sci & Technol WNLO Luoyu Rd 1037 Wuhan 430074 Hubei Peoples R China;

    Huazhong Univ Sci & Technol WNLO Luoyu Rd 1037 Wuhan 430074 Hubei Peoples R China;

    Huazhong Univ Sci & Technol WNLO Luoyu Rd 1037 Wuhan 430074 Hubei Peoples R China;

    Chinese Acad Sci Shanghai Synchrotron Radiat Facil Shanghai Adv Res Inst Shanghai 201204 Peoples R China;

    Wuhan Univ Sci & Technol Inst Adv Mat & Nanotechnol State Key Lab Refractories & Met Wuhan 430081 Hubei Peoples R China|City Univ Hong Kong Dept Phys Kowloon Tat Chee Ave Hong Kong 990077 Peoples R China|City Univ Hong Kong Dept Mat Sci & Engn Kowloon Tat Chee Ave Hong Kong 990077 Peoples R China;

    City Univ Hong Kong Dept Phys Kowloon Tat Chee Ave Hong Kong 990077 Peoples R China|City Univ Hong Kong Dept Mat Sci & Engn Kowloon Tat Chee Ave Hong Kong 990077 Peoples R China;

    Huazhong Univ Sci & Technol WNLO Luoyu Rd 1037 Wuhan 430074 Hubei Peoples R China;

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  • 正文语种 eng
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  • 关键词

    anode material; cobalt phosphide; sodium-ion capacitors; tin; yolk-shell;

    机译：阳极材料;钴磷化物;钠离子电容器;锡;蛋黄壳;

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