Lithium–sulfur batteries (LSBs) have attracted much attention due to their high theoretical specific capacity, energy density and low cost. However, the commercial application of LSBs is hindered due to the lithium polysulfide (LiPS) shuttle as well as the sluggish reaction kinetics. Herein, cobalt selenide (Co_0.85Se) nanowire arrays have been constructed on a carbon-modified separator by an in-situ electrodeposition technique without any other post-treatments such as coating with other ancillary materials. The introduced three-dimensional (3D) conductive carbon layer comprising of carbon nanotube (CNT) and acetylene black (AB) not only serves as the effective support for Co_0.85Se (CS) but also builds a hierarchical structure to promote the e⁻ transfer. The as-obtained CS-CNT/AB presents a strong anchoring effect on LiPSs and high electrocatalytic activity for sulfur reaction kinetics. As a result, the LSBs inserted with electrodeposition-enabled CS modified separator exhibit an outstanding rate capability (1560.4 mAh g⁻¹ at 0.1 C) and relatively low capacity decay of only 0.068% per cycle over 500 cycles at 2.0 C. This study provides a promising strategy to realize the rational construction of high-efficiency and long-life LSBs.

锂硫电池（LSB）由于其理论比容量高，能量密度高和成本低而备受关注。但是，由于多硫化锂（LiPS）的穿梭以及反应动力学的缓慢，阻碍了LSB的商业应用。本文中，硒化钴（Co _0.85 Se）纳米线阵列是通过原位电沉积技术在碳改性隔板上构建的，无需任何其他后处理（例如，使用其他辅助材料进行涂覆）。引入的三维（3D）的导电性碳层，包括碳纳米管（CNT）和乙炔黑（AB）不仅充当用于钴的有效支持的_0.85硒（CS），而且还建立了一个分级结构，以促进电子^-转移。如此获得的CS-CNT / AB对LiPSs具有很强的锚固作用，并且对硫反应动力学具有很高的电催化活性。结果，插入了具有电沉积功能的CS改性隔膜的LSB表现出出色的速率能力（在0.1 C时为1560.4 mAh g ^-1），并且在2.0 C的500个循环中相对较低的容量衰减（每个循环仅0.068％）。实现高效率和长寿命LSB的合理构建的一项有前途的策略。