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首页> 外文期刊>Advanced Functional Materials >Functional Mesoporous Carbon-Coated Separator for Long-Life, High-Energy Lithium-Sulfur Batteries
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Functional Mesoporous Carbon-Coated Separator for Long-Life, High-Energy Lithium-Sulfur Batteries

机译：功能性介孔碳包覆隔膜，适用于长寿命，高能量锂硫电池

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摘要

The lithium-sulfur (Li-S) battery is regarded as the most promising rechargeable energy storage technology for the increasing applications of clean energy transportation systems due to its remarkable high theoretical energy density of 2.6 kWh kg(-1), considerably outperforming today's lithium-ion batteries. Additionally, the use of sulfur as active cathode material has the advantages of being inexpensive, environmentally benign, and naturally abundant. However, the insulating nature of sulfur, the fast capacity fading, and the short lifespan of Li-S batteries have been hampered their commercialization. In this paper, a functional mesoporous carbon-coated separator is presented for improving the overall performance of Li-S batteries. A straightforward coating modification of the commercial polypropylene separator allows the integration of a conductive mesoporous carbon layer which offers a physical place to localize dissolved polysulfide intermediates and retain them as active material within the cathode side. Despite the use of a simple sulfur-carbon black mixture as cathode, the Li-S cell with a mesoporous carbon-coated separator offers outstanding performance with an initial capacity of 1378 mAh g(-1) at 0.2 C, and high reversible capacity of 723 mAh g(-1), and degradation rate of only 0.081% per cycle, after 500 cycles at 0.5 C.
机译：锂硫（Li-S）电池由于其2.6 kWh kg（-1）的极高理论能量密度而被公认为是最有前途的可充电储能技术，可用于清洁能源运输系统的不断增长的应用，大大超过了当今的锂电池离子电池。另外，使用硫作为活性阴极材料具有便宜，环境友好和天然丰富的优点。然而，硫的绝缘性质，快速的容量衰减以及锂-硫电池的短寿命已经阻碍了它们的商业化。在本文中，提出了一种功能性的介孔碳涂层隔膜，以改善Li-S电池的整体性能。商业聚丙烯隔膜的直接涂层修饰允许集成导电介孔碳层，该介孔碳层提供了物理位置以定位溶解的多硫化物中间体并将它们作为活性材料保留在阴极侧。尽管使用简单的硫炭黑混合物作为阴极，但具有中孔碳涂层隔板的Li-S电池仍具有出色的性能，在0.2 C时的初始容量为1378 mAh g（-1），并且可逆容量高。在0.5 C下进行500次循环后，每循环723 mAh g（-1）的降解率仅为0.081％。

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  • 来源
    《Advanced Functional Materials》 |2015年第33期|5285-5291|共7页
  • 作者

    Balach Juan; Jaumann Tony; Klose Markus; Oswald Steffen; Eckert Juergen; Giebeler Lars;

  • 作者单位

    Leibniz Inst Solid State & Mat Res IFW Dresden, Inst Complex Mat, D-01069 Dresden, Germany;

    Leibniz Inst Solid State & Mat Res IFW Dresden, Inst Complex Mat, D-01069 Dresden, Germany;

    Leibniz Inst Solid State & Mat Res IFW Dresden, Inst Complex Mat, D-01069 Dresden, Germany;

    Leibniz Inst Solid State & Mat Res IFW Dresden, Inst Complex Mat, D-01069 Dresden, Germany;

    Leibniz Inst Solid State & Mat Res IFW Dresden, Inst Complex Mat, D-01069 Dresden, Germany|Tech Univ Dresden, Inst Werkstoffwissensch, D-01069 Dresden, Germany;

    Leibniz Inst Solid State & Mat Res IFW Dresden, Inst Complex Mat, D-01069 Dresden, Germany|Tech Univ Dresden, Inst Werkstoffwissensch, D-01069 Dresden, Germany;

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  • 正文语种 eng
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  • 关键词

    electrochemical performance; lithium-sulfur batteries; long cycle life; mesoporous carbon; separators;

    机译：电化学性能;锂硫电池;循环寿命长;次碳;隔板;

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