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    • Constructing High-Throughput and Highly Adsorptive Lithium-Sulfur Battery Separator Coatings Based on Three-Dimensional Hexagonal Star-Shaped MOF Derivatives

    Lianshan Sun, Bo Zheng,Wanqiang Liu

    Journal of Colloid and Interface Science（2025）SCI 2区

    Cited 1|Views5
    Abstract
    The electrochemical performance of high-performance lithium-sulfur (Li-S) batteries is affected by many factors such as shuttle effect and lithium dendrites. To effectively solve this problem, a hexagonal star-shaped composite catalyst containing Co-N-C active sites (Co-NC-X) has been rationally developed under the joint action of Zn2+ and Co2+ bimetallic ions. By modifying it to the Li-S battery separator, Co-NC-X can not only act as a physical barrier to effectively prevent the diffusion of lithium polysulfide (LiPS), but also the special morphology can expose more active sites and have a strong chemisorption effect on LiPS, which effectively promotes the redox conversion of LiPS and mitigates the shuttle effect. Li-S battery with Co-NC-X exhibits excellent electrochemical performance. It has a high specific capacity and stable cycling performance, with an initial discharge capacity of 1406.9 mAh & sdot;g(-1) at 0.2 C and 876.8 mAh & sdot;g(-1) at 2 C, and a lower capacity decline rate of 0.093 % for 500 cycles.
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    Key words
    Separator,Coating layer,Lithium polysulfide,Li-S batteries,3D MOF
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    【要点】：本研究通过双金属离子作用开发了一种新型的三维六角星形MOF衍生复合催化剂，用于提升锂硫电池性能，有效解决穿梭效应和锂枝晶问题。
    

    【方法】：利用Zn2+和Co2+双金属离子的共同作用，合成了含有Co-N-C活性位点的六角星形复合催化剂（Co-NC-X）。
    

    【实验】：将Co-NC-X修饰到Li-S电池隔膜上，实验结果显示，该电池在0.2 C下初始放电容量为1406.9 mAh·g^-1，在2 C下为876.8 mAh·g^-1，且在500个循环中容量衰减率仅为0.093%。未提及具体数据集名称。