Cobalt disulfide (CoS₂) has been considered a promising anode material for lithium-ion batteries (LIBs) due to its high theoretical capacity of 870 mA h g⁻¹. However, its practical applications have been hampered by undesirable cycle life and rate performance due to the volume change and deterioration of electronic conductivity during the discharge-charge process. In this study, an interconnected CoS₂/N-doped carbon/carbon nanotube (CoS₂/NC-CNTs-700) network was successfully prepared to boost its lithium storage performance, in which small-size CoS₂ nanoparticles were confined by N-doped carbon and uniformly decorated on the surface of CNTs. N-doped carbon can effectively accommodate the large volume expansion of CoS₂ nanoparticles. Additionally, the 3D conductive nanostructure design offers adequate electrical/mass transport spacing. Benefiting from this, the CoS₂/NC-CNTs-700 electrode demonstrates a long cycle life (a residual capacity of 719 mA h g⁻¹ after 100 cycles at 0.2 A g⁻¹) and outstanding rate performance (335 mA h g⁻¹ at 5.0 A g⁻¹). This study broadens the design and application of CoS₂ and fosters the advances in battery anode research.

由于二硫化钴（CoS ₂）的理论容量高达870 mA hg ^-1，因此被认为是锂离子电池（LIB）的有希望的负极材料。然而，由于在放电-充电过程中的体积变化和电子传导性的劣化，其实际应用受到不希望的循环寿命和速率性能的阻碍。在本研究中，成功制备了互连的CoS ₂ / N掺杂碳/碳纳米管（CoS ₂ / NC-CNTs-700）网络，以提高其锂存储性能，其中小尺寸CoS ₂纳米颗粒被氮掺杂的碳限制并均匀地装饰在CNT的表面上。N掺杂碳可以有效地容纳CoS ₂纳米颗粒的大体积膨胀。另外，3D导电纳米结构设计提供了足够的电/质量传输间隔。从这个受益，所述的CoS ₂ / NC-的CNT-700电极展示了长的循环寿命（719毫安Hg的剩余容量^-1，在100次循环后0.2 A克^-1）和出色的倍率性能（335毫安汞柱^-1在5.0 A g ^-1）。这项研究拓宽了CoS ₂的设计和应用范围，并促进了电池负极研究的进展。