Abstract NiCo2S4 has received wide attention as a promising electrode material for supercapacitors (SCs), Li-ion batteries (LIBs), and Na-ion batteries (SIBs) in the past few years because of its excellent mechanical property, low cost, and rich redox chemistry. In addition, NiCo2S4 has higher electronic conductivity than the corresponding nickel cobaltite oxide (NiCo2O4) and higher redox ability than the corresponding single-phase sulfide. Nevertheless, the actual applications of pristine NiCo2S4 without unique morphology have been restrained on account of the small specific surface area, agglomeration, and big volume change during cycling, resulting in low reversible specific capacity (capacitance) and poor cycle stability at high rates. Constructing NiCo2S4 with novel nanostructures and heterogeneous core-shell structures have been considered as one of the most promising strategy to solve these problems. In the present review, the recent research developments in the electrochemical reaction mechanisms, preparation methods, morphology control, and electrochemical property of NiCo2S4-based composites as electrode materials for SCs and secondary batteries are summarized. The main focus is to discuss the dominant factors affecting the electrochemical properties of NiCo2S4-based materials, and then highlight hopeful strategies to improve specific capacitances/capacities and cycling stability, especially at high current densities. Finally, several insights into the future developments, challenges, and prospects of NiCo2S4-based composites for SCs, LIBs, and SIBs are proposed.

中文翻译：

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用于超级电容器和电池储能的基于 NiCo2S4 的纳米复合材料

摘要 NiCo2S4 作为一种有前途的超级电容器（SCs）、锂离子电池（LIBs）和钠离子电池（SIBs）电极材料，因其优异的机械性能、低成本和丰富的氧化还原化学。此外，NiCo2S4 比相应的钴酸镍氧化物 (NiCo2O4) 具有更高的电子导电性和比相应的单相硫化物更高的氧化还原能力。然而，由于循环过程中比表面积小、团聚和体积变化大，没有独特形态的原始NiCo2S4的实际应用受到限制，导致可逆比容量（电容）低和高倍率循环稳定性差。构建具有新型纳米结构和异质核壳结构的 NiCo2S4 被认为是解决这些问题的最有前途的策略之一。在本综述中，总结了 NiCo2S4 基复合材料作为 SCs 和二次电池电极材料的电化学反应机理、制备方法、形貌控制和电化学性能的最新研究进展。主要重点是讨论影响 NiCo2S4 基材料电化学性能的主要因素，然后重点介绍提高比电容/容量和循环稳定性的有希望的策略，尤其是在高电流密度下。最后，提出了对用于 SCs、LIBs 和 SIBs 的基于 NiCo2S4 的复合材料的未来发展、挑战和前景的一些见解。