Owing to the short of comprehensive and detailed design of both interlayer and sulfur host, the inherent shortcomings of shuttle effect and sluggish redox chemistry of sulfur cathodes makes the capacity of Lithium-sulfur (LiS) batteries decreasing rapidly. Herein, a three-dimensional (3D) hollow heterostructure, constructed by reduced graphene oxide coated hollow TiO₂ microspheres (noted as H-TiO₂@rGO heterostructures), is developed as progressive host-interlayer integrated electrodes for LiS batteries. It is noteworthy that the hollow TiO₂ microspheres provide a applicable space for loading and trapping sulfur nanoparticles, and the shell formed by TiO₂ particles ensures enrichment of catalytic active sites, thus effectively trapping and promoting the transformation of soluble polysulfides. The elastic rGO layer can greatly promote the electrical conductivity of S host, as well as to significantly buffer volume expansion during charge/discharge process. Furthermore, the H-TiO₂@rGO heterostructures modified integrated electrode can effectively improve the diffusion of lithium ions while preventing the shuttle effect due to the excellent trapping effect to polysulfides and the presence of continuous shell with holes composed of TiO₂ small particles. Therefore, the rational designed host-interlayer integrated electrode of H-TiO₂@rGO heterostructures not only confine the sulfur/polysulfides in 3D hollow microspheres, but also achieve catalytic transition of the polysulfides dissolved in electrolyte to solid Li₂S₂/Li₂S, both of which synergistically achieves an extremely fading rate of 0.025% per cycle over 1000 times at 1C. The H-TiO₂@rGO heterostructures proposed in this paper may supply a fresh idea for the fine design of LiS battery integrated electrodes.

由于中间层和硫主体缺乏全面细致的设计，硫正极的穿梭效应和氧化还原化学反应迟缓的固有缺点使得锂硫（Li S）电池的容量迅速下降。在此，一种三维 (3D) 中空异质结构，由还原氧化石墨烯涂层的中空 TiO ₂微球（称为 H-TiO ₂ @rGO 异质结构）构成，被开发为用于锂硫电池的渐进式主体-夹层集成电极。值得注意的是，中空TiO ₂微球为负载和捕获硫纳米粒子提供了适用空间，而TiO _{2形成的外壳}颗粒确保催化活性位点的富集，从而有效地捕获和促进可溶性多硫化物的转化。弹性 rGO 层可以极大地促进 S 主体的导电性，并在充电/放电过程中显着缓冲体积膨胀。此外，H-TiO _{2 @rGO 异质结构修饰的集成电极可以有效改善锂离子的扩散，同时防止穿梭效应，因为它对多硫化物具有优异的捕获效果，并且存在由 TiO 2}小颗粒组成的带孔的连续壳。因此，合理设计的H-TiO _{2主体-夹层集成电极}@rGO 异质结构不仅将硫/多硫化物限制在 3D 空心微球中，而且还实现了溶解在电解质中的多硫化物催化转变为固体 Li ₂ S ₂ /Li ₂ S，两者协同实现了 0.025% 的极低褪色率。在 1C 下循环超过 1000 次。本文提出的H-TiO ₂ @rGO异质结构可为锂硫电池集成电极的精细设计提供新思路。