Li-S batteries have been regarded as one of the most prospective energy-storage systems because of its high-energy-density. To suppress the shuttling effect of dissolved lithium polysulfides, different mass ratios petal-like nickel hydroxide nanosheets (NHN) decorated reduced graphene oxide (rGO) materials are synthesized in this study using a one-step hydrothermal method and applied modified separators in Li-S batteries. With up to 73.5 wt% of sulfur content in the cathode, the optimized sample (the mass ratio of graphene oxide to nickel nitrate is 1:9) enables discharge capacities up to 1579 mAh g⁻¹ at 0.2 C (the areal sulfur loading is 5 mg cm⁻²). The cell also exhibits a retention of 840 mAh g⁻¹ in specific capacity after 200 cycles, exhibiting higher utilizations and better cycling stabilities for Li-S batteries. Electrochemical measurements and density functional theory (DFT) calculations prove that NHN plays a critical role in promoting the redox reaction kinetics of Li-S batteries, and the high conductivity of rGO enhances the electrochemical function of NHN. This study provides a low cost approach for the developments of modified separators in future practical Li-S batteries.

Li-S电池因其高能量密度而被认为是最有前途的储能系统之一。为了抑制溶解的多硫化锂的穿梭效应，本研究使用一步水热法合成了不同质量比的花瓣状氢氧化镍纳米片（NHN）装饰的还原氧化石墨烯（rGO）材料，并在Li-S中应用了改性隔膜电池。经过优化的样品（氧化石墨烯与硝酸镍的质量比为1：9）在阴极中具有高达73.5 wt％的硫含量，在0.2 C时的放电容量高达1579 mAh g ^-1（单位面积硫负荷为5mg cm ^-2）。该电池还具有840 mAh g ^-1的保持力在200次循环后的特定容量中，Li-S电池具有更高的利用率和更好的循环稳定性。电化学测量和密度泛函理论（DFT）计算证明，NHN在促进Li-S电池的氧化还原反应动力学中起关键作用，rGO的高电导率增强了NHN的电化学功能。这项研究为在未来的实用Li-S电池中开发改进型隔板提供了一种低成本的方法。