锂硫（Li-S）电池因其较高的理论比容量（1675 mAh g -1 ）而备受关注，但在商业化过程中仍面临诸多挑战，尤其是穿梭效应。因此，减少多硫化物的穿梭是获得高性能锂硫电池的关键因素。在这里，铋基化合物被制备为 Li-S 电池的硫主阴极。然后是S@Co/N-CNTs@Bi 2 S 3和S@Co/N-CNTs@Bi 2 O 3采用酒精加热熔体扩散法合成复合阴极。所制备的正极在 1 C 下 900 次循环期间的容量衰减率分别为 0.038% 和 0.056%。出色的循环性能可以归因于Bi 2 S 3和Bi 2 O 3对多硫化物的强烈吸附，抑制了它们的溶解和扩散。本研究提出的研究将为铋基化合物作为硫主体以提高阴极的循环寿命提供新线索，并为高性能锂硫电池提供有前景的设计策略。
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Bismuth-based compounds as efficient sulfur hosts for novel lithium-sulfur batteries
Lithium-sulfur (Li–S) batteries have been paid more attention due to its high theoretical specific capacity (1675 mAh g−1), but they still face many challenges in the commercialization process, especially the shuttle effect. Hence, reducing the shuttle of polysulfides is a key factor to obtain high-performance Li–S batteries. Inhere, bismuth based compounds were prepared as the sulfur host cathodes for Li–S batteries. Then the S@Co/N-CNTs@Bi2S3 and S@Co/N-CNTs@Bi2O3 composite cathodes were synthesized by alcohol heating and melt diffusion method. The as-prepared cathodes deliver a capacity decay rate of 0.038% and 0.056% during 900 cycles at 1 C, respectively. The outstanding cycling performance can be put down to the strong adsorption of Bi2S3 and Bi2O3 to polysulfides, inhibiting their dissolution and diffusion. The research proposed in this study will provide a new clue for bismuth based compounds as sulfur hosts to improve the cycle life of cathodes, and furnish a promising design strategy for the high-performance Li–S batteries.