Separator modification is a promising strategy with regard to lithium–sulfur batteries for trapping polysulfides and suppressing the involved shuttle effect. Herein, a sulfur-deficient molybdenum disulfide/nitrogen-doped carbon composite with an open and interconnected structure (IMoS2-x) was synthesized through facile salt template method using recrystallized salt powder. Unlike the two-dimensional sheet structure obtained through conventional salt template method, an effective three-dimensional IMoS2-x composite design can be achieved using small salt powder as a template. The prepared IMoS2-x-coated polypropylene separator (referred to as IMoS2-x/PP) exhibited remarkable electrochemical performances such as high initial discharge capacity of 1405.1 mAh/g and rate capability of 754.16 mAh/g at 0.1 and 3C, respectively. Furthermore, IMoS2-x/PP exhibited robust cycling performance of 911.18 mAh/g after 80 cycles at 0.2C under high sulfur loading and lean electrolyte conditions, with the electrolyte-to-sulfur ratio (E/S ratio) of 7.5 μL mg−1.

中文翻译：

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盐模板法制备三维互连缺硫MoS2/氮掺杂碳复合材料用于锂硫电池隔膜改性


对于锂硫电池来说，隔膜改性是一种很有前途的策略，用于捕获多硫化物并抑制相关的穿梭效应。在此，利用重结晶盐粉通过简便的盐模板法合成了具有开放互连结构的缺硫二硫化钼/氮掺杂碳复合材料（IMoS2-x）。与通过传统盐模板方法获得的二维片状结构不同，使用小盐粉作为模板可以实现有效的三维IMoS2-x复合材料设计。所制备的IMoS2-x涂层聚丙烯隔膜（简称IMoS2-x/PP）表现出优异的电化学性能，例如在0.1和3C下分别具有1405.1 mAh/g的高初始放电容量和754.16 mAh/g的倍率容量。此外，在高硫负载和贫电解质条件下，IMoS2-x/PP 在 0.2C 下循环 80 次后表现出 911.18 mAh/g 的稳健循环性能，电解质与硫的比率（E/S 比）为 7.5 μL mg− 1.