The industrialization of lithium-sulfur (Li-S) batteries is largely hindered by the low cycle performance stemming from the polysulfide shuttle effect and slow reaction kinetics. In order to address these problems, an advanced design strategy for multifunctional sulfur cathode with core-shell structure is proposed by embedding transition metal-based porous carbon composites derived from metal-organic framework (MOF) within covalent organic framework (COF). The inner carbon/metal core within the composite serves both as sulfur trapping and catalyst for promoting sulfur reaction kinetics. The COF shell, rich in micropores and polar functional groups, further mitigates lithium polysulfide (LiPS) shuttling through its sieving effect. This strategy is demonstrated by fabricating Co-decorated MIL-125-NH₂-derived Co/Ti-NC composite coated with a layer of TpPa-1 COF. Based on these advantages, the S/Co/Ti-NC@TpPa cathode delivers an outstanding cycling performance. The battery shows a high initial specific capacity of 1135 mAh g⁻¹ at 0.2 C, and the capacity decay rate is 0.05% per cycle at 1 C after 500 cycles. The area capacity of the cell reaches 3.6 mAh cm⁻² at a high sulfur loading of 4.46 mg cm⁻². The MOF in COF core-shell design provides a promising strategy for developing practical sulfur cathode.

多硫化物穿梭效应和缓慢的反应动力学导致的低循环性能在很大程度上阻碍了锂硫（Li-S）电池的工业化。为了解决这些问题，通过在共价有机骨架（COF）中嵌入源自金属有机骨架（MOF）的过渡金属基多孔碳复合材料，提出了一种具有核壳结构的多功能硫正极的先进设计策略。复合材料中的内部碳/金属核既用作硫捕获剂又用作促进硫反应动力学的催化剂。富含微孔和极性官能团的 COF 壳进一步减轻了多硫化锂 (LiPS) 通过其筛分效应穿梭。该策略通过制造共同装饰的 MIL-125-NH _2来证明衍生的 Co/Ti-NC 复合材料涂有一层 TpPa-1 COF。基于这些优势，S/Co/Ti-NC@TpPa正极具有出色的循环性能。该电池在 0.2 C 时显示出 1135 mAh g ^-1的高初始比容量， 500 次循环后容量衰减率为 1 C 时每次循环 0.05%。^{在4.46 mg cm -2}的高硫负载下，电池的面积容量达到3.6 mAh cm ^-2。COF 核壳设计中的 MOF 为开发实用的硫正极提供了一种有前途的策略。