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首页> 外文期刊>RSC Advances >W18O49 nanowire composites as novel barrier layers for Li-S batteries based on high loading of commercial micro-sized sulfur
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W18O49 nanowire composites as novel barrier layers for Li-S batteries based on high loading of commercial micro-sized sulfur

机译：W18O49纳米线复合材料作为Li-S电池的新型屏障层，基于高负荷的商业微尺寸硫

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摘要

Li-S batteries are regarded as one of the most promising energy-storage devices due to their high theoretical energy density, five times higher than that of lithium-ion batteries (2600 vs. similar to 500 W h kg(-1)). However, the polysulfide shuttle effect is the primary challenge for future applications of Li-S batteries. Herein, a novel barrier layer material, nonstoichiometric W18O49 nanowires, is reported to alleviate the undesirable shuttle effect, thereby largely boosting the specific capacity and cyclability of Li-S batteries. Without particular cathode design, the introduction of W18O49 nanowires enables the commercially available micro-sized sulfur cathode with 70% sulfur loading to deliver a respectable initial discharge capacity of 1142 mA h g(-1) and retain a specific capacity of about 809 mA h g(-1) after 50 cycles, even at a current density of 0.5 A g(-1). To the best of our knowledge, such a capacity fading for Li-S batteries based on high loading of commercial micro-sized sulfur has been rarely reported.
机译：Li-S电池被认为是由于其高理论能量密度，比锂离子电池的高度高五倍（2600V，类似于500WH kg（-1））。然而，多硫化物梭效果是Li-S电池未来应用的主要挑战。这里，据报道，一种新型阻挡层材料，非级别计数，W18O49纳米线，以减轻不期望的梭效果，从而大大提高了Li-S电池的特定容量和可循环性。没有特定的阴极设计，引入W18O49纳米线使市售的微尺寸硫阴极具有70％硫加载，以提供1142 mA Hg（-1）的可观初始放电容量，并保留约809 mA Hg的特定容量（ -1）50次循环后，即使在0.5ag（-1）的电流密度下。据我们所知，已经很少报道这种基于高负荷的商业微尺寸硫的LI-S电池的这种能力。

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  • 来源
    《RSC Advances》 |2016年第18期|共6页
  • 作者

    Zhang Weikun; Lin Chong; Cong Shan; Hou Junyu; Bin Liu; Geng Fengxia; Jin Jian; Wu Minghong; Zhao Zhigang;

  • 作者单位

    Shanghai Univ Coll Environm &

    Chem Engn Shanghai 200444 Peoples R China;

    Chinese Acad Sci Suzhou Inst Nanotech &

    Nanobion Key Lab Nanodevices &

    Applicat Suzhou 21512 Peoples R China;

    Chinese Acad Sci Suzhou Inst Nanotech &

    Nanobion Key Lab Nanodevices &

    Applicat Suzhou 21512 Peoples R China;

    Soochow Univ Coll Chem Chem Engn &

    Mat Sci Suzhou 215123 Peoples R China;

    NW Univ Xian Shanxi Key Lab Physicoinorgan Chem Key Lab Synthet &

    Nat Funct Mol Chem Coll Chem &

    Mat Sci Minist Educ Xian 710069 Peoples R China;

    Soochow Univ Coll Chem Chem Engn &

    Mat Sci Suzhou 215123 Peoples R China;

    Chinese Acad Sci Suzhou Inst Nanotech &

    Nanobion Key Lab Nanodevices &

    Applicat Suzhou 21512 Peoples R China;

    Shanghai Univ Coll Environm &

    Chem Engn Shanghai 200444 Peoples R China;

    Chinese Acad Sci Suzhou Inst Nanotech &

    Nanobion Key Lab Nanodevices &

    Applicat Suzhou 21512 Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
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