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首页> 外文期刊>New Journal of Chemistry >Template-assisted in situ confinement synthesis of nitrogen and oxygen co-doped 3D porous carbon network for high-performance sodium-ion battery anode
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Template-assisted in situ confinement synthesis of nitrogen and oxygen co-doped 3D porous carbon network for high-performance sodium-ion battery anode

机译：用于高性能钠离子电池阳极的氮气和氧共掺杂3D多孔碳网络的模板辅助合成

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摘要

Non-graphitic carbons have shown great advantages as anodes for sodium ion batteries. However, they deliver an unsatisfactory capacity, especially at high rate, owing to the sluggish sodiation kinetics. In this work, we synthesized well-distributed nitrogen and oxygen co-doped three-dimensional ultrathin amorphous porous carbon network via a simple NaCl template-assisted in situ confinement pyrolysis strategy. The porous carbon network with oxygen-containing groups provides abundant room (surface area of 282.78 m(2) g(-1)) for the storage of Na+ and good wettability for the sufficient contact of the active material and the electrolyte, the affluent pores and the large interlayer space offer smooth passage for the insertion of Na+ and the transportation of electrons, and high-content nitrogen (N: 12.44 at%) doping affords more defects and active sites for the redox capacitance reaction of Na+. When used as an anode for sodium-ion batteries, the as-prepared sample presents high reversible capacity (416 mA h g(-1) at 0.1 A g(-1) after 100 cycles), superior rate capability (213.8 mA h g(-1) at 5 A g(-1)), and excellent cycling performance at a super-high rate (142 mA h g(-1) at 10 A g(-1) after 1000 cycles with capacity retention of 94%). This work provides a new strategy to effectively construct continuous porous carbon nanostructures with uniform dual heteroatom doping for high-performance sodium-ion battery anodes.
机译：非石墨碳碳作为钠离子电池的阳极表明了很大的优点。然而，由于缓慢的动力学，它们提供不满意的能力，特别是高速率。在这项工作中，我们通过简单的NaCl模板辅助原位限制热解策略来合成分布良好分布的氮和氧共掺杂的三维超空白多孔碳网络。具有含氧基团的多孔碳网络提供储存的空间（表面积为282.78米（2）G（-1）），用于储存Na +，良好的润湿性，用于活性材料和电解质的充分接触，富孔孔并且大的层间空间提供了用于插入Na +的光滑通道和电子的运输，以及高含量的氮气（N：12.44处为％）掺杂提供更多缺陷和活性位点，用于Na +的氧化还原电容反应。当用作阳极的钠离子电池时，制备的样品在100次循环后的0.1Ag（-1）的高可逆容量（416 mA Hg（-1）），优异的速率能力（213.8 mA hg（ - 1）在5A（-1））中，在1000次循环后10A g（-1）的超高速率（142mA Hg（-1）的优异循环性能，容量保留为94％）。该工作提供了一种新的策略，以有效地构建具有均匀双杂原子掺杂的连续多孔碳纳米结构，用于高性能钠离子电池阳极。

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  • 来源
    《New Journal of Chemistry》 |2018年第17期|共7页
  • 作者

    Wang Dan; Wang Zhiyuan; Li Yuan; Luo Shaohua; Dong Kangze; Liu Yanguo; Qi Xiwei;

  • 作者单位

    Northeastern Univ Sch Mat Sci &

    Engn Shenyang 110819 Liaoning Peoples R China;

    Northeastern Univ Sch Mat Sci &

    Engn Shenyang 110819 Liaoning Peoples R China;

    Northeastern Univ Qinhuangdao Sch Mat Sci &

    Engn Qinhuangdao 066004 Peoples R China;

    Northeastern Univ Sch Mat Sci &

    Engn Shenyang 110819 Liaoning Peoples R China;

    Northeastern Univ Sch Mat Sci &

    Engn Shenyang 110819 Liaoning Peoples R China;

    Northeastern Univ Sch Mat Sci &

    Engn Shenyang 110819 Liaoning Peoples R China;

    Northeastern Univ Sch Mat Sci &

    Engn Shenyang 110819 Liaoning Peoples R China;

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