Lithium-sulfur (Li-S) batteries are of considerable interest for high-density energy storage. However, the adoption of Li-S batteries to date has been severely plagued by the polysulfide shuttling effect, whereby polysulfide molecules dissolve into the electrolyte and shuttle across the separator to react with the anode materials, leading to a rapidly fading capacity. Herein, by directly coating a thin layer of reduced graphene oxide (rGO)/sodium lignosulfonate (SL) composite on the standard polypropylene (PP) separator, we produce a [email protected]/PP separator with abundant negatively charged sulfonic groups in the porous lignin network, which effectively suppress the translocation of the negatively charged polysulfide (PS) ions without compromising the transport of positively charged Li⁺ ions. Using the [email protected]/PP separator, we demonstrate a highly robust Li-S battery with a capacity retention of 74% over 1,000 cycles. This study defines an effective strategy to inhibit the PS shuttling effect for highly robust Li-S batteries.

锂硫（Li-S）电池在高密度储能方面引起了广泛关注。然而，迄今为止，多硫化物的穿梭效应严重地困扰了采用Li-S电池，由此多硫化物分子溶解到电解质中并穿梭穿过隔板与阳极材料反应，从而导致快速褪色的能力。在此，通过在标准聚丙烯（PP）隔板上直接涂覆一层还原石墨烯（rGO）/木质素磺酸钠（SL）复合材料的薄层，我们生产出一种[电子邮件保护] / PP隔板，在多孔结构中带有大量带负电荷的磺酸基团木质素网络，可有效抑制带负电的多硫化物（PS）离子的转运，而不会损害带正电的Li ⁺的传输离子。使用[受电子邮件保护] / PP分隔器，我们展示了一款坚固耐用的Li-S电池，在1,000次循环中的容量保持率为74％。这项研究定义了一种有效的策略，以抑制高度耐用的Li-S电池的PS穿梭效应。