A honeycomb‐like 3D N/S co‐doped porous carbon‐coated cobalt sulfide (CoS, Co₉S₈, and Co_1–xS) composite (CS@PC) is successfully prepared using polyacrylonitrile (PAN) as the nitrogen‐containing carbon source through a facile solvothermal method and subsequent in situ conversion. As an anode for lithium‐ion batteries (LIBs), the CS@PC composite exhibits excellent electrochemical performance, including high reversible capacity, good rate capability, and cyclic stability. The composite electrode delivers specific capacities of 781.2 and 466.0 mAh g⁻¹ at 0.1 and 5 A g⁻¹, respectively. When cycled at a current density of 1 A g⁻¹, it displays a high reversible capacity of 717.0 mAh g⁻¹ after 500 cycles. The ability to provide this level of performance is attributed to the unique 3D multi‐level porous architecture with large electrode–electrolyte contact area, bicontinuous electron/ion transport pathways, and attractive structure stability. Such micro‐/nanoscale design and engineering strategies may also be used to explore other nanocomposites to boost their energy storage performance.

中文翻译：

---

将 CoSx 纳米晶体封装到 N/S 共掺杂蜂窝状 3D 多孔碳中用于高性能锂存储

使用聚丙烯腈（PAN）作为氮，成功制备了蜂窝状3D N/S共掺杂多孔碳包覆硫化钴（CoS、Co ₉ S ₈和Co _{1– x} S）复合材料（CS@PC）。通过简单的溶剂热方法和随后的原位转化来含有碳源。作为锂离子电池（LIB）的负极，CS@PC复合材料表现出优异的电化学性能，包括高可逆容量、良好的倍率性能和循环稳定性。该复合电极在0.1和5 A g ^{-1下的比容量分别为781.2和466.0 mAh g -1}。^{当以1 A g -1}的电流密度循环时， 500次循环后显示出717.0 mAh g ^-1的高可逆容量。提供这种性能水平的能力归功于独特的3D多层多孔结构，具有大的电极-电解质接触面积、双连续电子/离子传输路径和有吸引力的结构稳定性。这种微/纳米级设计和工程策略也可用于探索其他纳米复合材料，以提高其储能性能。