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首页> 外文期刊>ACS applied materials & interfaces >Rational Design of a Gel-Polymer-Inorganic Separator with Uniform Lithium-Ion Deposition for Highly Stable Lithium-Sulfur Batteries
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Rational Design of a Gel-Polymer-Inorganic Separator with Uniform Lithium-Ion Deposition for Highly Stable Lithium-Sulfur Batteries

机译：高稳态锂 - 硫电池均匀锂离子沉积凝胶聚合物 - 无机分离器的理性设计

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摘要

Lithium-sulfur (Li-S) batteries have received intense interest as next-generation electrochemical energy storage systems because of their high specific energy and natural abundance potential. However, its practical reality is seriously limited by the safety concerns from heterogeneous lithium deposition and the so-called "shuttle effect". Herein, this work reports a novel gel-polymer-inorganic separator specifically for the lithium sulfur battery, which could enable homogeneous lithium deposition and inhibit the diffusion of polysulfides, simultaneously. The composite separator exhibits a superior electrochemical performance up to 500 cycles at 0.5 C with a capacity retention of 718.2 mA h g(-1). It is worth noting that the corresponding fade rate for 1000 cycles was 0.04%/cycle even tested at 2 C. This outstanding cycling stability can be attributed to the strong anchoring effect of polar carboxymethylcellulose sodium to polysulfides, which is confirmed by the permeation experiments and X-ray photoelectron spectroscopy analyses. Besides, the Al2O3 coating layer on the anode side could achieve relatively uniform lithium deposition and inhibit the growth of dendrite to some extent. As a result, this study may provide a novel strategy for the effective design of separators toward the practical reality of the high-performance lithium sulfur battery.
机译：锂 - 硫（LI-S）电池由于其高能量和天然丰富潜力而受到下一代电化学能量存储系统的强烈兴趣。然而，其实际现实受到异质锂沉积的安全问题和所谓的“梭效应”的安全问题。这里，该工作报告了一种专门用于锂硫电池的新型凝胶聚合物 - 无机分离器，其能够同时实现均匀锂沉积并抑制多硫化物的扩散。复合隔膜在0.5℃下表现出高达500个循环的优异电化学性能，容量保持718.2 mA H G（-1）。值得注意的是，在2℃下甚至测试的相应淡出率为1000次循环为0.04％/周期。这种出色的循环稳定性可归因于极性羧甲基纤维素钠对多硫化物的强锚固效果，这是通过渗透实验证实的X射线光电子能谱分析。此外，阳极侧的Al 2 O 3涂层可以在一定程度上实现相对均匀的锂沉积并抑制树突的生长。因此，本研究可以为分离器的有效设计提供一种新的策略，以实现高性能锂硫电池的实际现实。

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  • 来源
    《ACS applied materials & interfaces》 |2019年第39期|共8页
  • 作者

    Wang Pengfei; Bao Jiejun; Lv Kezhong; Zhang Na; Chang Zhi; He Ping; Zhou Haoshen;

  • 作者单位

    Nanjing Univ Jiangsu Key Lab Artificial Funct Mat Ctr Energy Storage Mat &

    Technol Natl Lab Solid State Microstruct Coll Engn &

    Appl Nanjing 210093 Jiangsu Peoples R China;

    Nanjing Univ Jiangsu Key Lab Artificial Funct Mat Ctr Energy Storage Mat &

    Technol Natl Lab Solid State Microstruct Coll Engn &

    Appl Nanjing 210093 Jiangsu Peoples R China;

    Nanjing Univ Jiangsu Key Lab Artificial Funct Mat Ctr Energy Storage Mat &

    Technol Natl Lab Solid State Microstruct Coll Engn &

    Appl Nanjing 210093 Jiangsu Peoples R China;

    Nanjing Univ Jiangsu Key Lab Artificial Funct Mat Ctr Energy Storage Mat &

    Technol Natl Lab Solid State Microstruct Coll Engn &

    Appl Nanjing 210093 Jiangsu Peoples R China;

    Natl Inst Adv Ind Sci &

    Technol Energy Technol Res Inst 1-1-1 Umezono Tsukuba Ibaraki 3058568 Japan;

    Nanjing Univ Jiangsu Key Lab Artificial Funct Mat Ctr Energy Storage Mat &

    Technol Natl Lab Solid State Microstruct Coll Engn &

    Appl Nanjing 210093 Jiangsu Peoples R China;

    Nanjing Univ Jiangsu Key Lab Artificial Funct Mat Ctr Energy Storage Mat &

    Technol Natl Lab Solid State Microstruct Coll Engn &

    Appl Nanjing 210093 Jiangsu Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学工业;
  • 关键词

    lithium-sulfur batteries; carboxymethylcellulose sodium; Al2O3; separator; symmetric cells; highly stable cycle life;

    机译：锂 - 硫磺电池;羧甲基纤维素钠;Al2O3;分离器;对称细胞;高度稳定的循环寿命;

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