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A 2D montmorillonite-carbon nanotube interconnected porous network that prevents polysulfide shuttling

ZHOU Ming-xia ZHOU Wen-hua LONG Xiang ZHU Shao-kuan Xu Peng OUYANG Quan-sheng SHI Bin SHAO Jiao-jing

周明霞, 周文华, 龙翔, 朱绍宽, 徐鹏, 欧阳全胜, 石斌, 邵姣婧. 二维蒙脱土-碳纳米管交联多孔网络中间层对多硫化物穿梭的抑制作用. 新型炭材料(中英文), 2023, 38(6): 1070-1079. doi: 10.1016/S1872-5805(23)60783-8
引用本文: 周明霞, 周文华, 龙翔, 朱绍宽, 徐鹏, 欧阳全胜, 石斌, 邵姣婧. 二维蒙脱土-碳纳米管交联多孔网络中间层对多硫化物穿梭的抑制作用. 新型炭材料(中英文), 2023, 38(6): 1070-1079. doi: 10.1016/S1872-5805(23)60783-8
ZHOU Ming-xia, ZHOU Wen-hua, LONG Xiang, ZHU Shao-kuan, Xu Peng, OUYANG Quan-sheng, SHI Bin, SHAO Jiao-jing. A 2D montmorillonite-carbon nanotube interconnected porous network that prevents polysulfide shuttling. New Carbon Mater., 2023, 38(6): 1070-1079. doi: 10.1016/S1872-5805(23)60783-8
Citation: ZHOU Ming-xia, ZHOU Wen-hua, LONG Xiang, ZHU Shao-kuan, Xu Peng, OUYANG Quan-sheng, SHI Bin, SHAO Jiao-jing. A 2D montmorillonite-carbon nanotube interconnected porous network that prevents polysulfide shuttling. New Carbon Mater., 2023, 38(6): 1070-1079. doi: 10.1016/S1872-5805(23)60783-8

二维蒙脱土-碳纳米管交联多孔网络中间层对多硫化物穿梭的抑制作用

doi: 10.1016/S1872-5805(23)60783-8
基金项目: 国家自然科学基金(51972070、52372185和52062004);贵州省高层次创新型人才(黔科合平台人才-GCC[2022]013-1);贵州省教育厅高校科技创新团队(黔教技[2023]054号);贵州省科技计划项目(黔科合基础[2020]1Z042;黔科合支撑[2021]一般317)和贵州大学培育项目(贵大培育[2019]01号)
详细信息
    通讯作者:

    邵姣婧,博士,教授. E-mail:xjshao@gzu.edu.cn

  • 中图分类号: TB332;TM53

A 2D montmorillonite-carbon nanotube interconnected porous network that prevents polysulfide shuttling

Funds: This work was supported by National Natural Science Foundation of China (51972070, 52372185 and 52062004), Guizhou Provincial High Level Innovative Talents Project (QKHPTRC-GCC[2022]013-1), Innovation Team for Advanced Electrochemical Energy Storage Devices and Key Materials of Guizhou Provincial Higher Education Institutions (QianJiaoJi[2023]054), Guizhou Provincial Science and Technology Projects (QKHJC[2020]1Z042, QKHZC[2021]YB317) and Cultivation Project of Guizhou University (GDPY[2019]01)
More Information
    Author Bio:

    周明霞与周文华为共同第一作者

    Corresponding author: SHAO Jiao-jing, Ph.D, Professor. E-mail:xjshao@gzu.edu.cn
  • 摘要: 将一维碳纳米管(CNT)和二维蒙脱土(MMT)纳米片复合并用于修饰商用聚丙烯(PP)隔膜。得益于碳纳米管的高电子导电性,以及MMT对多硫化物(LiPS)的强吸附能力和低的锂离子传输势垒,所得的交联多孔CNT-MMT复合阻挡层具有优异的结构稳定性和高的锂离子传输能力,表现出抑制LiPS穿梭的性能,因此实现了高硫利用率。结果表明,该复合阻挡层修饰的PP隔膜有效提升了锂硫电池的锂离子扩散系数、放电比容量和循环稳定性。所组装锂硫电池的0.1 C初始放电比容量为1373 mAh g−1,且具有良好的循环稳定性,在1 C下经500次循环后其每圈容量衰减率仅为0.062%。
  • FIG. 2779.  FIG. 2779.

    FIG. 2779..  FIG. 2779.

    Figure  1.  Characterization of 2D MMT. (a) AFM image and the corresponding height profile (inset), (b) SEM image and (c) SAED pattern of the MMT nanosheets. (d) XRD patterns and (e) FTIR spectra of the 2D MMT nanosheets and MMT lamellar crystals. (f) Zeta potential plot of the aqueous suspensions containing 2D MMT

    Figure  2.  (a) Photos of different samples soaked in a Li2S6/DOL/DME solution with different time, (b) O 1s spectra and (c) Li 1s XPS spectra of MMT before and after absorbing Li2S6. (d-f) Nucleation of the Li2S measurements of the cells based on various electrodes. (g) Potentiostatic charge profiles of the cells with MMT, CNT and CNT-MMT electrode. (h) Cross-section SEM image and (i) EDS mapping of the MMT-CNT

    Figure  3.  (a-d) SEM images of PP, PP-MMT, PP-CNT and PP-CNT-MMT. (e-h) The electrolyte contact angles on various separators. (i) High magnification SEM image of PP-CNT-MMT. (j) Digital photos of PP-CNT and PP-CNT-MMT before and after folding

    Figure  4.  (a-d) CV curves of the batteries with different separators at the scan rates of 0.1, 0.2, 0.3 and 0.4 mV s−1. (e) Lithium ion diffusion coefficient (DLi+) of the cells with PP, PP-MMT, PP-CNT and PP-CNT-MMT

    Figure  5.  (a) Nyquist plots, (b) galvanostatic charge/discharge profiles at 0.1 C and (c) rate performance of the Li-S battery with PP-CNT-MMT, PP-CNT, PP-MMT and PP, respectively. (d) CV curves for the 1st, 2nd and 3rd cycles of the cell with PP-CNT- MMT at a sweep rate of 0.1 mV s−1

    Figure  6.  The cycle performance of the batteries with PP-CNT-MMT, PP-MMT, PP-CNT and PP at (a) 0.2 C and (b) 0.5 C with sulfur loading of 1.0 mg cm−2. (c) The long-term cycling performance of these batteries at 1 C

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出版历程
  • 收稿日期:  2023-05-21
  • 修回日期:  2023-09-23
  • 网络出版日期:  2023-10-20
  • 刊出日期:  2023-11-23

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