Artificial Lithium Isopropyl-Sulfide Macromolecules as an Ion-Selective Interface for Long-Life Lithium-Sulfur Batteries

ACS Applied Materials & Interfaces
Jie LiuChenglin Yan

Abstract

The persistent reduction reactions between the hyperactive lithium metal (Li) and dissolved polysulfides would passivate the Li metal and rapidly decrease the cathodic active materials, thus leading to low Coulombic efficiency and a short cycle life of lithium-sulfur (Li-S) batteries. Herein, we construct artificial lithium isopropyl-sulfide macromolecules as an ion-selective interface on the Li metal (IS-Li) by a facile electrochemical polymerization method, in which the polymer network improves the elasticity and toughness to accommodate the volume change of the Li anode and the formed lithium-organosulfides provide great mechanical strength to resist the destruction of Li dendrites. Importantly, this interfacial layer is proved to be sufficient in damping polysulfide anion diffusion and stopping irreversible reduction between polysulfides and metallic Li, which greatly contribute to the performance improvement of Li-S batteries. The resulting Li-S batteries exhibit long-term stability with high capacity retention and Coulombic efficiency. This effective strategy sets a new approach for regulating the interfacial chemistry of Li metal anodes, which is significant for highly stable Li-S batteries.

References

Dec 16, 2011·Nature Materials·Peter G BruceJean-Marie Tarascon
Jul 16, 2014·Chemical Reviews·Arumugam ManthiramYu-Sheng Su
Feb 5, 2015·Journal of the American Chemical Society·Chun-Peng YangLi-Jun Wan
Sep 2, 2015·Journal of the American Chemical Society·Shuya WeiLynden A Archer
Dec 25, 2015·Advanced Materials·Nian-Wu LiYu-Guo Guo
Nov 13, 2019·Angewandte Chemie·Huijun YangJiulin Wang

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Citations

Aug 13, 2021·ACS Nano·Zhenkang WangChenglin Yan
Aug 25, 2021·ACS Applied Materials & Interfaces·Zhipeng JiangJia Xie
Nov 12, 2021·ACS Applied Materials & Interfaces·Juncheng QiuZhan Lin

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