Lithium-sulfur (Li–S) battery has been considered a promising energy-storage devices due to its high energy density and low cost. However, the low utilization of sulfur and rapid capacity degradation resulted from low conductivity of sulfur, shuttle effect of sulfides intermediates and slow reaction kinetics restrain its practical application. In this work, a sulfur host composite constructed by CMK-3 confining MoS₂ nanoparticles was developed through a simple hydrothermal and post-annealing method. In this composite, most nano-size MoS₂ nanoparticles are confined within the pores and channels of CMK-3 (MoS₂@CMK-3), acting as a “restricted nanoreactor” shows multiple effect for lithium polysulfides (LiPSs). On the one hand, the highly conductive CMK-3 not only accelerate the electrons transfer, but also can physically capture soluble LiPSs through its abundant mesopores. More significantly, the active MoS₂ within the nanoreactor exhibits a synergistic effect of strong chemical adsorption and subsequent catalytic conversion effect for LiPSs, which efficiently inhibits the shuttle effect. As a result, the as-prepared cathode based-MoS₂-50@CMK-3 delivers a high specific capacity of 950.3 mA h g⁻¹ at 2 C and still maintain a discharge specific capacity of 440.3 mA h g⁻¹ after 1600 cycles with a capacity decay rate of 0.033 % per cycle. This work would guide the rational design of advanced sulfur cathodes for Li–S batteries.

锂硫（Li-S）电池由于其高能量密度和低成本而被认为是一种有前途的储能装置。然而，硫的电导率低、硫化物中间体的穿梭效应以及缓慢的反应动力学导致硫的利用率低、容量衰减快，限制了其实际应用。在这项工作中，通过简单的水热和后退火方法开发了由 CMK-3 限制 MoS ₂ 纳米颗粒构建的硫主体复合材料。在该复合材料中，大多数纳米尺寸的 MoS ₂ 纳米粒子被限制在 CMK-3 的孔和通道内（MoS ₂ @CMK-3），充当“受限纳米反应器”显示出多硫化锂 (LiPS) 的多重效应。一方面，高导电性的CMK-3不仅加速电子转移，而且可以通过其丰富的介孔物理捕获可溶性LiPS。更重要的是，纳米反应器内的活性MoS ₂ 对LiPSs表现出强烈的化学吸附和随后的催化转化作用的协同效应，有效抑制了穿梭效应。因此，所制备的阴极基 MoS ₂ -50@CMK-3 在 2 C 下具有 950.3 mAh g ⁻¹ 的高比容量，并且仍然保持放电比容量1600 次循环后容量为 440.3 mA h g ⁻¹ ，每个循环容量衰减率为 0.033%。这项工作将指导锂硫电池先进硫正极的合理设计。