Abstract Originating from the severe polysulfide dissolution and notorious polysulfide shuttle, the practical applications of lithium-sulfur (Li-S) batteries confront huge challenges in low active material utilization, rapid capacity degradation, short cycling lifespan, and inferior rate capability. Herein, a rationally modified polypropylene (PP) separator with multi-functional nickel hydroxide@carbon nanotube (NiOOH@CNT) coating layer is proposed to overcome these critical obstacles. The conductive and porous CNT networks ensure the rapid electron/ion transport to achieve high reactivation and reutilization of active materials, as well as physically block the polysulfide migration. Meanwhile, the porous NiOOH nanowalls arrays layer with polar surface demonstrates superior chemical absorption ability for anchoring polysulfides, thereby significantly suppressing the shuttle effect. Such elaborately designed separator endows Li-S batteries with high specific capacity, superior capacity retention and remarkable rate capability. This work sheds new light on the multi-functional separators for high-performance Li-S batteries.

中文翻译：

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增强聚丙烯隔膜对高性能锂硫电池的多硫化物吸附和再利用能力

摘要 由于严重的多硫化物溶解和臭名昭著的多硫化物穿梭，锂硫（Li-S）电池的实际应用面临着活性材料利用率低、容量衰减快、循环寿命短和倍率性能差的巨大挑战。在此，提出了一种具有多功能氢氧化镍@碳纳米管（NiOOH@CNT）涂层的合理改性聚丙烯（PP）隔膜来克服这些关键障碍。导电和多孔的碳纳米管网络确保了电子/离子的快速传输，以实现活性材料的高再活化和再利用，并在物理上阻止多硫化物迁移。同时，具有极性表面的多孔 NiOOH 纳米壁阵列层表现出优异的化学吸收能力，用于锚定多硫化物，从而显着抑制穿梭效应。这种精心设计的隔膜赋予锂硫电池高比容量、优异的容量保持率和卓越的倍率性能。这项工作为高性能锂硫电池的多功能隔膜提供了新的思路。