Selenium sulfide has been regarded as very promising alternatives to partially address the issues of Li–S batteries due to their better electrical conductivity than sulfur cathode; however, the serious dissolution of intermediate polyselenides and polysulfides still brings about the fast capacity decay and low coulombic efficiency in Li–SeS₂ batteries. Here, a flexible electrode composing of hollow CoP nanoparticles embedded in two–dimensional nitrogen doped carbon arrays supported on carbon cloth were employed as SeS₂ immobilizers for the first time. The integrated host not only provides a high adsorption ability for lithium polysulfides/polyselenides (LiPSs/LiPSes) through the unique physical confinement and strong chemical immobilization, but also facilitate the fast diffusion of LiPSs and LiPSes on the surface of CoP catalyst. It was demonstrated through the microstructural, chemical, and electrochemical characterization, CoP catalyst can greatly promote the nucleation of LiPSs and LiPSes, and fast convert into insoluble products. DFT calculations and ex–situ XPS measurements can interpret the fundamental mechanism for the fast polysulfide/polyselenide conversion. Therefore, our elaborate designed architecture and surface chemistry of CoP–N/C@CC with a high SeS₂ loading of 2.6 mg cm⁻² exhibit a large specific discharge capacity of 1026 mAh g⁻¹ at 0.2 A g⁻¹, high Coulombic efficiency, good rate capability, and excellent cycling performance with a reversible capacity of 778 mAh g⁻¹ at 1 A g⁻¹ after 300 cycles. Our work will give contributes to the research community to rationally encapsulate SeS₂ cathodes with unique hosts and architectures, providing fundamental understanding of the catalytic mechanism in Li–SeS₂ batteries.

硫化硒由于具有比硫阴极更好的导电性，因此被认为是解决锂锂电池问题的非常有前途的替代品。然而，中间聚硒化物和多硫化物的严重溶解仍然导致Li-SeS ₂电池的容量快速衰减和库仑效率低。在这里，采用由空心CoP纳米颗粒组成的柔性电极作为嵌入SeS _2的方法，该空心CoP纳米颗粒嵌入在碳布上的二维氮掺杂碳阵列中首次使用防盗锁。集成的主体不仅通过独特的物理限制和强大的化学固定作用提供了对多硫化锂/硒化锂（LiPSs / LiPSes）的高吸附能力，而且还促进了LiPSs和LiPSes在CoP催化剂表面的快速扩散。通过微观结构，化学和电化学表征证明，CoP催化剂可以大大促进LiPS和LiPSes的成核，并快速转化为不溶性产物。DFT计算和异位XPS测量可以解释快速进行多硫化物/聚硒化物转化的基本机理。因此，我们精心设计的CoP–N / C @ CC结构和表面化学与2.6 mg cm的高SeS ₂负载^-2在0.2 A g ^-1时具有1026 mAh g ^-1的大比放电容量，高库仑效率，良好的倍率性能和出色的循环性能，经过1 A g ^-1后可逆容量为778 mAh g ^-1 300个循环。我们的工作将为研究界做出贡献，以合理的方式封装具有独特主体和结构的SeS ₂阴极，从而提供对Li-SeS ₂电池催化机理的基本了解。