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Pyrrole as a promising electrolyte additive to trap polysulfides for lithium-sulfur batteries

机译:吡咯作为一种有前途的电解质添加剂,可以捕获锂硫电池中的多硫化物

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摘要

Lithium sulfur batteries are a promising energy storage devices beyond conventional lithium ion batteries. However, the "shuttle effect" of soluble polysulfides is a major barrier between electrodes, resulting in rapid capacity fading. To address above issue, pyrrole has been investigated as an electrolyte additive to trap polysulfides. When pyrrole is added into electrolyte, a surface protective layer of polypyrrole can be formed on the sulfur cathode, which not only acts as a conductive agent to provide an effective electron conduction path but also acts as an absorbing agent and barrier layer suppressing the diffusion of polysulfide intermediates. The results demonstrate that an appropriate amount of pyrrole added into the electrolyte leads to excellent cycling stability and rate capability. Apparently, pyrrole is an effective additive for the entrapment of polysulfides of lithium-sulfur batteries. (C) 2017 Elsevier B.V. All rights reserved.
机译:锂硫电池是超越常规锂离子电池的有前途的储能设备。然而,可溶性多硫化物的“穿梭效应”是电极之间的主要障碍,导致容量快速下降。为了解决上述问题,已经研究了吡咯作为捕集多硫化物的电解质添加剂。当将吡咯添加到电解质中时,可以在硫阴极上形成聚吡咯的表面保护层,该表面保护层不仅充当提供有效电子传导路径的导电剂,而且充当抑制扩散的吸收剂和阻挡层。多硫化物中间体。结果表明,将适量的吡咯添加到电解质中导致优异的循环稳定性和速率能力。显然,吡咯是截留锂硫电池中多硫化物的有效添加剂。 (C)2017 Elsevier B.V.保留所有权利。

著录项

  • 来源
    《Journal of power sources》 |2017年第30期|175-182|共8页
  • 作者单位

    Yanshan Univ, State Key Lab Metastable Mat Sci & Technol, Qinhuangdao 066004, Peoples R China|Yanshan Univ, Coll Environm & Chem Engn, Hebei Key Lab Appl Chem, Qinhuangdao 066004, Peoples R China;

    Yanshan Univ, State Key Lab Metastable Mat Sci & Technol, Qinhuangdao 066004, Peoples R China;

    Yanshan Univ, State Key Lab Metastable Mat Sci & Technol, Qinhuangdao 066004, Peoples R China;

    Yanshan Univ, State Key Lab Metastable Mat Sci & Technol, Qinhuangdao 066004, Peoples R China;

    Yanshan Univ, State Key Lab Metastable Mat Sci & Technol, Qinhuangdao 066004, Peoples R China;

    Yanshan Univ, State Key Lab Metastable Mat Sci & Technol, Qinhuangdao 066004, Peoples R China|Yanshan Univ, Coll Environm & Chem Engn, Hebei Key Lab Appl Chem, Qinhuangdao 066004, Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Lithium sulfur batteries; Electrolyte additive; Pyrrole; Polysulfides trapping;

    机译:锂硫电池;电解质添加剂;吡咯;多硫化物捕集;

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