Effectively adsorbing and suppressing the polysulfide shuttle by polar materials are of great importance in lithium-sulfur (Li–S) batteries. Herein, the multifunctional SnS@C MS heterostructure consisting of porous carbon shell and SnS microflower-like core is prepared and demonstrated as an efficient Li–S battery cathode with electrocatalytic activity. The integrated physical confinement, strong chemical interaction, and rapid polysulfides (LiPSs) conversion kinetics are mutually promoted to facilitate a successive LiPSs adsorption-conversion with a significantly suppressed shuttle effect. Notably, systematic investigations and experiments reveal that the porous carbon layer can strongly entrap the LiPSs and subsequently facilitate its conversion kinetics between the liquid and solid phases. As a result, SnS@C/S MS cathode can deliver a high initial capacity of 1074.7 mAh g⁻¹ at 0.1 C and ultra-stable cycling performance with a slow capacity decay rate of 0.073% per cycle over 600 cycles at 0.5 C. Moreover, the excellent durability with higher S loading and current densities are also achieved. Thus, this work proffers a facile and promising approach to design and prepare efficient Li–S battery cathodes with high reversible capacities and excellent cycle performance.

在锂硫（Li–S）电池中，有效吸附和抑制极性材料引起的多硫化物穿梭非常重要。在此，制备了由多孔碳壳和SnS微花状核组成的多功能SnS @ C MS异质结构，并证明了其是具有电催化活性的高效Li-S电池阴极。相互促进了整体的物理限制，强烈的化学相互作用和快速的多硫化物（LiPSs）转换动力学，以促进连续的LiPSs吸附-转换，并显着抑制了穿梭效应。值得注意的是，系统的研究和实验表明，多孔碳层可以强力捕获LiPS，并随后促进其在液相和固相之间的转化动力学。结果是，在0.1 C时为^-1，超稳定的循环性能，在0.5 C时，在600次循环中，每循环的容量衰减率为0.073％，缓慢。此外，还具有出色的耐用性和更高的S负载和电流密度。因此，这项工作为设计和制备具有高可逆容量和出色循环性能的高效Li–S电池阴极提供了一种简便而有前途的方法。