Abstract Lithium-sulfur (Li–S) batteries have been recognized as one of the most promising lithium-ion power sources. However, their commercial application is greatly hindered by the incompletely used active materials and unsatisfactory cyclability. Herein, a novel well-honeycombed porous graphene framework (3D-G) was developed using a PMMA-sphere-assisted vacuum filtration method, and used as an advanced sulfur host for enhancing Li–S battery performance. The unique well-honeycombed porous graphene framework not only enhances the electronic conductivity of Li–S cathodes, but also provides numerous active sites for sulfur adsorption. Moreover, the ultrafine sulfur uniformly embedded into the well-honeycombed porous graphene framework increases the utilization of active materials. Benefiting from these synergistic features, 3D-G/S cathodes exhibit excellent electrochemical performance, such as long-cycling stability with a ultra-low capacity fading of 0.099% per cycle over 200 cycles at a high current density, holding great promise for development of practically viable Li–S batteries.

中文翻译：

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将超细硫均匀嵌入蜂窝状多孔石墨烯框架中，用于高度稳定的锂硫电池

摘要 锂硫（Li-S）电池被认为是最有前途的锂离子电源之一。然而，它们的商业应用受到活性材料使用不完全和循环性能不理想的极大阻碍。在此，使用 PMMA 球辅助真空过滤方法开发了一种新型蜂窝状多孔石墨烯框架 (3D-G)，并将其用作高级硫主体以提高 Li-S 电池性能。独特的蜂窝状多孔石墨烯骨架不仅增强了 Li-S 正极的电子电导率，而且为硫吸附提供了许多活性位点。此外，均匀嵌入蜂窝状多孔石墨烯骨架中的超细硫增加了活性材料的利用率。受益于这些协同功能，