Lithium-sulfur batteries (LiSBs) are widely deemed as the most promising energy storage devices to substitute for traditional Li-ion batteries. However, its wide application is impeded by the soluble lithium polysulfides (LiPSs), which is called the shuttle effect, and the irregular distribution of final product Li₂S. Herein, based on the interfaces engineering, CoOCo₄N hetero-nanocages are used as the sulfur host for LiSBs. Taking advantage of the polarity of CoO with the conductivity of Co₄N, CoOCo₄N nanocages not only can provide large void space for sulfur volume fluctuation, but also can adsorb polysulfides and simultaneously regulate the nucleation of solid Li₂S by the ‘trapping-diffusion-conversion’ mechanism, which significantly enhances the redox kinetic of LiSBs and the utilization of active materials. Eventually, LiSBs with CoOCo₄N nanocages host exhibit higher rate capacity (737 mAh·g⁻¹ at 2 C) and cycling stability (662 mAh·g⁻¹ at 1 C after 350 cycles). Even when the areal sulfur loading is as high as 3.0 mg cm⁻², a high capacity of 713 mAh·g⁻¹ can still be achieved after 100 cycles at 0.2 C. This host with sufficient polar-conductive interfaces expands ‘trapping-diffusion-conversion’ concept for the design of fast kinetic and high performance LSBs.

锂硫电池（LiSBs）被广泛认为是替代传统锂离子电池最有前途的储能装置。然而，其广泛应用受到称为穿梭效应的可溶性多硫化锂 (LiPSs) 以及最终产物 Li ₂ S的不规则分布的阻碍。在此，基于界面工程，CoO Co ₄ N 异质纳米笼是用作 LiSB 的硫主体。利用CoO的极性和Co ₄ N的导电性，CoO Co ₄ N纳米笼不仅可以为硫体积波动提供大的空隙空间，而且可以吸附多硫化物并同时调节固体Li ₂的成核S通过“捕获-扩散-转化”机制显着提高了LiSBs的氧化还原动力学和活性材料的利用率。最终，具有 CoO Co ₄ N 纳米笼主体的LiSB表现出更高的倍率容量（737 mAh·g ^-1在 2 C 下）和循环稳定性（在 1 C 下 350 次循环后662 mAh·g ^-1）。即使面积硫负载量高达 3.0 mg cm ^-2，在 0.2 C 下循环 100 次后仍可实现713 mAh·g ^-1的高容量。用于设计快速动力学和高性能 LSB 的转换概念。