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首页> 外文期刊>Materials Science and Engineering >Anchoring function for polysulfide ions of ultrasmall SnS_2 in hollow carbon nanospheres for high performance lithium-sulfur batteries
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Anchoring function for polysulfide ions of ultrasmall SnS_2 in hollow carbon nanospheres for high performance lithium-sulfur batteries

机译：高性能锂硫电池中空碳纳米球中超小SnS_2中多硫化物离子的锚固功能

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摘要

Tin sulfide-anchored sulfur-hollow carbon nanospheres (S/AHCNS-SnS_2) composites are synthesized by uniformly dispersing conductive SnS_2 particles into hollow carbon nanospheres activated with potassium hydroxide, followed by impregnating sulfur. Surface morphology and structure of this composite are characterized using a field emission scanning electron microscopy (FESEM), field emission transmission electron microscopy (FETEM), Brunauer-Emmett-Teller (BET) method, X-ray power diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). The first discharge capacity of the sample containing 10 wt.% SnS_2 exhibits a high special capacity value of about 1237.5 mAh g~(-1) at 0.2 C, and after 200 cycles retains 924 mAh g"1. Tin sulfide particles play a favorable role on adsorption towards polysulfides which would influence electrochemical process. This strategy of immobilization of sulfur with small amount of metal sulfide particles anchored in AHCNS provides a considerable approach to elevate the sulfur loading, coulombic efficiency, and cycling stability for Li-S batteries.
机译：通过将导电的SnS_2颗粒均匀分散在氢氧化钾活化的空心碳纳米球中，然后浸渍硫，可以合成硫化锡固定的硫空心碳纳米球（S / AHCNS-SnS_2）复合材料。使用场发射扫描电子显微镜（FESEM），场发射透射电子显微镜（FETEM），Brunauer-Emmett-Teller（BET）方法，X射线功率衍射（XRD）和X-射线表征该复合材料的表面形态和结构射线光电子能谱（XPS）。包含10 wt。％SnS_2的样品的首次放电容量在0.2 C下显示出约1237.5 mAh g〜（-1）的高特殊容量值，并且在200次循环后保留924 mAh g“ 1。硫化锡颗粒起着良好的作用。这种作用是通过固定在AHCNS中的少量金属硫化物颗粒固定硫的策略，为提高Li-S电池的硫负载量，库仑效率和循环稳定性提供了重要途径。

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  • 来源
    《Materials Science and Engineering》 |2016年第3期|46-54|共9页
  • 作者

    Xueliang Li; Linbo Chu; Yiyi Wang; Lisheng Pan;

  • 作者单位

    School of Chemistry and Chemical Engineering, Hefei University of Technology, Hefei 230009, PR China,Anhui Key Laboratory of Controllable Chemical Reaction and Material Chemical Engineering, Hefei 230009, PR China;

    School of Chemistry and Chemical Engineering, Hefei University of Technology, Hefei 230009, PR China,Anhui Key Laboratory of Controllable Chemical Reaction and Material Chemical Engineering, Hefei 230009, PR China;

    School of Chemistry and Chemical Engineering, Hefei University of Technology, Hefei 230009, PR China,Anhui Key Laboratory of Controllable Chemical Reaction and Material Chemical Engineering, Hefei 230009, PR China;

    School of Chemistry and Chemical Engineering, Hefei University of Technology, Hefei 230009, PR China,Anhui Key Laboratory of Controllable Chemical Reaction and Material Chemical Engineering, Hefei 230009, PR China;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    Li-S batteries; Sulfur loading; Tin sulfide; Hollow carbon nanospheres; Polysulfides;

    机译：锂电池硫负荷;硫化锡;空心碳纳米球;多硫化物;

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