Developing high-performance Li-S batteries with high sulfur loading is highly desirable for practical application and remains a major challenge. To achieve this goal, the following requirements for designing carbon/metal compound composites need to be met: (i) the carbon materials need to exhibit suitable specific surface area, void structure, and electrical conductivity; (ii) the weight content of the metal compounds should be low; and (iii) the metal compounds need to show a strong adsorption and efficient electrocatalytic function for LiPSs. In this study, inspired by the body structure of an octopus, a new carbon/NiS₂ hierarchical composite is reported, in which the apical NiS₂ nanoparticles (0D) on a 1D carbon nanotubes (CNTs) are supported on a three-dimensional carbon (3DC) framework (3DC-CNTs-NiS₂). The 3DC-CNTs-NiS₂ composite has a high specific surface area (271 m² g^–1), good electrical conductivity, and low NiS₂ content (9.2 wt %), and the apical NiS₂ nanoparticles are capable of adsorption and electrocatalysis toward LiPSs, demonstrated by both electrochemical characterization and theoretical calculation. When used as a cathode host of the Li-S battery, it exhibits an ultra-stable cycling performance with a fade rate of 0.043% per cycle over 1000 cycles; even with a high S loading (6.5 mg cm^–2 with 90 wt % of S), the soft package battery delivers a high area capacity of 5.0 mAh cm^–2 under the E/S ratio of 5 μL_E mg^–1_s. This work provides a new approach to design and fabricate multi-functional S hosts with high S loading.

中文翻译：

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章鱼启发的尖端NiS ₂纳米颗粒的设计，该纳米颗粒负载在高碳负载锂硫电池的高效宿主上，用作多层碳复合材料

对于实际应用，开发具有高硫负载的高性能Li-S电池是非常需要的，并且仍然是一个重大挑战。为了实现这一目标，需要满足以下设计碳/金属化合物复合材料的要求：（i）碳材料需要表现出合适的比表面积，空隙结构和导电性；（ii）金属化合物的重量含量应低；（iii）金属化合物需要对LiPS具有强吸附力和有效的电催化功能。在这项研究中，受章鱼身体结构的启发，报道了一种新的碳/ NiS ₂分层复合材料，其中顶端NiS ₂一维碳纳米管（CNT）上的纳米颗粒（0D）支撑在三维碳（3DC）框架（3DC-CNTs-NiS ₂）上。3DC-CNTs-NiS ₂复合材料具有较高的比表面积（271 m ² g ^–1），良好的导电性和较低的NiS ₂含量（9.2 wt％），并且顶端的NiS ₂纳米粒子能够吸附和电催化电化学表征和理论计算均证明了其对LiPS的抗性。当用作Li-S电池的阴极主体时，它表现出超稳定的循环性能，在1000次循环中，每循环的衰落率为0.043％。即使高硫负荷（6.5 mg cm ^–2用90重量％的S），软封装电池可提供的5.0毫安cm的高面积容量^-2的5μL的E / S比之下_Ë毫克^-1_小号。这项工作为设计和制造具有高S负载的多功能S主机提供了一种新方法。