硫作为锂硫电池的正极材料，具有较高的理论比容量，且储量丰富、价格低廉、以及对环境较为友好，是下一代高能量密度锂金属电池的重点研究方向之一。然而，锂硫电池的商业化应用仍有很多问题尚未解决，其中包括：在循环过程中中间产物多硫化物在电解质高度溶解，及其正负极之间来回移动产生的“飞梭效应”，导致活性物质利用率低、库伦效率低以及容量迅速衰减等现象。此外，在循环放电过程中，硫会产生巨大的体积膨胀，反复地进行体积膨胀和收缩会导致部分活性物质从正极脱落，造成锂硫电池不可逆的容量损失。为解决锂硫电池的诸多挑战，我们采用简单的一步水热合成法制备了硫化铟和碳纳米管（In₂S₃/CNTs）的复合材料，该介孔材料能有效吸附多硫化物，抑制多硫化物的“飞梭效应”，有助于提高电池的循环寿命。此外，该材料还具有较高的比表面积，有助于负载较多的硫。基于以上优势，我们将合成得到得到的In₂S₃/CNTs复合材料应用于锂硫电池中，显著提高了锂硫电池的循环性能。

Sulphur, as the cathode material of lithium-sulfur batteries, has high theoretical specific capacity, abundant reserves, low price, and is friendly to the environment, and is one of the key research directions of the next-generation lithium metal batteries which have high energy density. Commercial applications of lithium sulfur batteries, however, there are still many problems unsolved, including that in the process of circulation intermediate disulfide dissolved in electrolyte highly, and are moving back and forth between the cathode of “ shuttle effect”, leading to lower the utilization of active material, the phenomenon such as coulomb efficiency is low and capacity attenuation rapidly. In addition, in the process of cyclic discharge, sulfur will produce huge volume expansion, repeated volume expansion and contraction will lead to part of the active material from the positive electrode fall off, resulting in irreversible capacity loss of lithium-sulfur battery. In order to solve the challenges of lithium-sulfur batteries, we prepared the composite material of indium sulfide and carbon nanotubes (In₂S₃/CNTs) by a simple one-step hydrothermal synthesis method. The mesoporous material can effectively adsorb polysulfides, inhibit the “shuttle effect” of polysulfides, and help to improve the cycle life of batteries. In addition, the material also has a high specific surface area, which helps to load more sulfur. Based on the above advantages, we applied the synthesized In₂S₃/CNTs composite material to lithium-sulfur batteries, which significantly improved the cycle performance of lithium-sulfur batteries.