The lithium sulfur (Li-S) battery is an active research area in the field of energy storage systems, but the shuttle effect is a serious obstacle hindering its application. Herein, a CoSe₂/CoO Mott-Schottky catalyst is blended with carbon nanotubes (CNTs) and subsequently coated onto a commercial separator as a modifier, whereby the synergy between the high electrocatalytic activity of the CoSe₂/CoO heterostructure and high conductivity of the CNTs selectively mediate the conversion of sulfur species. As a result, a cell with a CoSe₂/CoO-CNTs modified separator displays a high initial discharge capacity of 1573 and 910 mAh g^–1 at 0.1 and 2 C, respectively. Furthermore, a low decay rate of 0.070% per cycle can be obtained over 500 cycles at 2 C. The results of this study suggest that the as-prepared CoSe₂/CoO-CNTs is an effective modifier that can improve the performance of Li-S batteries for use in next-generation energy storage systems. This study provides fundamental insights into the rational design of Mott-Schottky catalysts for practical high-performance Li-S batteries.

锂硫（Li-S）电池是储能系统领域的一个活跃研究领域，但穿梭效应是阻碍其应用的严重障碍。在此，CoSe ₂ /CoO Mott-Schottky 催化剂与碳纳米管 (CNT) 混合，随后作为改性剂涂覆在商用隔膜上，从而发挥 CoSe ₂ /CoO 异质结构的高电催化活性与碳纳米管的高导电性之间的协同作用CNT 选择性地介导硫物种的转化。因此，具有 CoSe _{2 /CoO-CNTs 改性隔膜的电池显示出 1573 和 910 mAh g} ^–1的高初始放电容量分别为 0.1 和 2 C。此外，在 2 C 下经过 500 次循环后，每个循环的衰减率为 0.070%。这项研究的结果表明，所制备的 CoSe ₂ /CoO-CNTs 是一种有效的改性剂，可以提高 Li-用于下一代储能系统的 S 电池。这项研究为合理设计用于实用高性能锂硫电池的莫特-肖特基催化剂提供了基本见解。