Several challenging issues, such as the poor conductivity of sulfur, shuttle effects, large volume change of cathode, and the dendritic lithium in anode, have led to the low utilization of sulfur and hampered the commercialization of lithium–sulfur batteries. In this study, a novel three-dimensionally interconnected network structure comprising Co₉S₈ and multiwalled carbon nanotubes (MWCNTs) was synthesized by a solvothermal route and used as the sulfur host. The assembled batteries delivered a specific capacity of 1154 mA h g⁻¹ at 0.1 C, and the retention was 64% after 400 cycles at 0.5 C. The polar and catalytic Co₉S₈ nanoparticles have a strong adsorbent effect for polysulfide, which can effectively reduce the shuttling effect. Meanwhile, the three-dimensionally interconnected CNT networks improve the overall conductivity and increase the contact with the electrolyte, thus enhancing the transport of electrons and Li ions. Polysulfide adsorption is greatly increased with the synergistic effect of polar Co₉S₈ and MWCNTs in the three-dimensionally interconnected composites, which contributes to their promising performance for the lithium–sulfur batteries.

几个具有挑战性的问题，例如硫的导电性差，穿梭效应，阴极的大量变化以及阳极中的树枝状锂，导致硫的利用率低，并阻碍了锂硫电池的商业化。在这项研究中，新型的三维互连的网络结构包括Co ₉ S ₈和多壁碳纳米管（MWCNTs）的溶剂热途径合成并用作硫主体。组合电池在0.1 C下的比容量为1154 mA hg ^-1，在0.5 C下进行400次循环后保留率为64％。极性和催化Co ₉ S ₈纳米颗粒对多硫化物具有很强的吸附作用，可以有效降低穿梭作用。同时，三维互连的CNT网络改善了整体导电性并增加了与电解质的接触，从而增强了电子和Li离子的传输。极性互连的复合材料中极性Co ₉ S ₈和MWCNT的协同作用大大提高了聚硫化物的吸附，这有助于它们在锂硫电池中的应用前景看好。