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首页> 外文期刊>Electrochimica Acta >Mass-producible method for preparation of a carbon-coated graphite@plasma nano-silicon@carbon composite with enhanced performance as lithium ion battery anode
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Mass-producible method for preparation of a carbon-coated graphite@plasma nano-silicon@carbon composite with enhanced performance as lithium ion battery anode

机译：用于制备碳涂层石墨的碳涂层石墨锌碳复合材料的碳复合材料，具有增强的性能作为锂离子电池阳极

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摘要

Carbon-coated core-shell structure artificial graphite@plasma nano-silicon@carbon (AG@PNSi@C) composite, applying as lithium ion battery anode material, has been prepared via spray drying method. The plasma nano-silicon (<100 nm), which contained amorphous silicon, was synthesized by radio frequency induction plasma system with the high temperatures processing capability and high quench rates. The artificial graphite in the composite acts as the core which supports the particle and provides electroconductivity, while PNSi attached on the surface of the core, enhances the specific capacity of the composite. The as prepared composite shows superior performance as anode in lithium-ion batteries, regarding to the initial Coulombic efficiency and cycle life. The initial Coulombic efficiency of AG@PNSi@C electrode is 81.0% with a discharge capacity of 553 mAh g(-1) and a recharge capacity of 448 mAh g(-1). During cycling, AG@PNSi@C exhibits excellent performance with a very low capacity fading that the discharge capacity maintains 498.2 mAh g(-1) and 449.4 mAh g(-1) after 250 cycles and 500 cycles. AG@PNSi@C also shows enhanced resistance against high current density. Besides the remarkable electrochemical performances, the facile and mass-producible synthesis process makes the AG@PNSi@C composite very promising for its application in lithium-ion batteries. (C) 2017 Elsevier Ltd. All rights reserved.
机译：碳涂层芯壳结构人造石墨@等离子纳米硅@碳（Ag @ PNSI @ C）复合材料，施加为锂离子电池阳极材料，已通过喷雾干燥方法制备。通过具有高温处理能力和高淬火速率的射频感应等离子体系统合成含有非晶硅的等离子体纳米硅（<100nm）。复合材料中的人造石墨用作支撑颗粒并提供导电性的芯，而PNSI附着在芯的表面上，增强了复合材料的比容量。作为初始库仑效率和循环寿命，如准备的复合材料显示为锂离子电池中的阳极优异的性能。 AG @ PNSI @ C电极的初始库仑效率为81.0％，放电容量为553mAhg（-1），为448mAhg（-1）的再充电容量。在循环期间，AG @ PNSI @ C表现出优异的性能，具有非常低的容量衰落，放电容量在250次循环和500个循环后保持498.2mah g（-1）和449.4mahg（-1）。 AG @ PNSI @ C还显示出对高电流密度的增强电阻。除了显着的电化学性能之外，容易和批量生产的合成过程还使AG @ PNSI @ C复合材料非常有希望其在锂离子电池中的应用。 （c）2017 Elsevier Ltd.保留所有权利。

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  • 来源
    《Electrochimica Acta》 |2017年第2017期|共9页
  • 作者

    Chen Hedong; Wang Zhoulu; Hou Xianhua; Fu Lijun; Wang Shaofeng; Hu Xiaoqiao; Qin Haiqing; Wu Yuping; Ru Qiang; Liu Xiang; Hu Shejun;

  • 作者单位

    South China Normal Univ Sch Phys &

    Telecommun Engn Guangdong Prov Key Lab Quantum Engn &

    Quantum Mat Guangzhou 510006 Guangdong Peoples R China;

    Nanjing Tech Univ Key Lab Flexible Elect KLOFE Nanjing 211816 Jiangsu Peoples R China;

    South China Normal Univ Sch Phys &

    Telecommun Engn Guangdong Prov Key Lab Quantum Engn &

    Quantum Mat Guangzhou 510006 Guangdong Peoples R China;

    Nanjing Tech Univ Key Lab Flexible Elect KLOFE Nanjing 211816 Jiangsu Peoples R China;

    South China Normal Univ Sch Phys &

    Telecommun Engn Guangdong Prov Key Lab Quantum Engn &

    Quantum Mat Guangzhou 510006 Guangdong Peoples R China;

    South China Normal Univ Sch Phys &

    Telecommun Engn Guangdong Prov Key Lab Quantum Engn &

    Quantum Mat Guangzhou 510006 Guangdong Peoples R China;

    Guangxi Key Lab Superhard Mat Guilin 541004 Peoples R China;

    Nanjing Tech Univ Key Lab Flexible Elect KLOFE Nanjing 211816 Jiangsu Peoples R China;

    South China Normal Univ Sch Phys &

    Telecommun Engn Guangdong Prov Key Lab Quantum Engn &

    Quantum Mat Guangzhou 510006 Guangdong Peoples R China;

    Nanjing Tech Univ Key Lab Flexible Elect KLOFE Nanjing 211816 Jiangsu Peoples R China;

    South China Normal Univ Sch Phys &

    Telecommun Engn Guangdong Prov Key Lab Quantum Engn &

    Quantum Mat Guangzhou 510006 Guangdong Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 电化学工业;物理化学（理论化学）、化学物理学;
  • 关键词

    Plasma nano-silicon; Core-shell structure; Spray drying; Anode; Lithium ion battery;

    机译：等离子体纳米硅;核心壳结构;喷雾干燥;阳极;锂离子电池;

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