Lithium-sulfur (Li-S) batteries are considered the most promising candidate for achieving a low-cost high-energy-density system. One of the biggest deterrents during the practical application of Li-S batteries is the shuttle effect which causes fast capacity degradation and poor rate performance. 3D CoNi₂S₄ with 3D interconnected porous nitrogen doping carbon was prepared by sulfurizing the precursor Prussian blue analogues. The CoNi₂S₄ nanoparticles are confined in the carbon framework, affording interconnected macro-mesoporous channels. The constructed 3D CoNi₂S₄ modified separator effectively accommodates enough electrolytes and provides more exposed active sites that suppress the shuttle effect through trapping polysulfides and accelerating the lithiation of S₈ to Li₂S. Thus, Li-S batteries with 3D CoNi₂S₄-PP separators exhibit high-rate capacity and remarkable cycle stability. Furthermore, based on the modified separators, a high sulfur loading cathode delivers an areal capacity of 5.62 mAh cm^-2. The separator size expands further to assemble the 1Ah Li-S pouch cell, confirming the practicality. This work provides an efficient strategy with a modified separator for high-performance Li-S batteries.

锂硫（Li-S）电池被认为是实现低成本高能量密度系统的最有希望的候选者。在锂硫电池的实际应用中，最大的阻碍之一是穿梭效应，它会导致容量快速衰减和倍率性能差。通过硫化前体普鲁士蓝类似物制备具有 3D 互连多孔氮掺杂碳的3D CoNi ₂ S _{4 。}CoNi ₂ S ₄纳米颗粒被限制在碳框架中，提供相互连接的大介孔通道。构建的 3D CoNi ₂ S ₄改性隔膜有效地容纳足够的电解质并提供更多暴露的活性位点，通过捕获多硫化物和加速 S ₈锂化为Li ₂ S 来抑制穿梭效应。因此，具有 3D CoNi ₂ S ₄ -PP 隔膜的 Li-S 电池表现出高倍率容量和显着的循环稳定性。此外，基于改进的隔膜，高硫负载正极的面积容量为 5.62 mAh cm ^-2。隔膜尺寸进一步扩大以组装 1Ah Li-S 软包电池，证实了实用性。这项工作为高性能锂硫电池提供了一种有效的改进隔膜的策略。