Supercapacitors are favorable energy storage devices in the field of emerging energy technologies with high power density, excellent cycle stability and environmental benignity. The performance of supercapacitors is definitively influenced by the electrode materials. Nickel sulfides have attracted extensive interest in recent years due to their specific merits for supercapacitor application. However, the distribution of electrochemically active sites critically limits their electrochemical performance. Notable improvements have been achieved through various strategies such as building synergetic structures with conductive substrates, enhancing the active sites by nanocrystallization and constructing nanohybrid architecture with other electrode materials. This article overviews the progress in the reasonable design and preparation of nickel sulfides and their composite electrodes combined with various bifunctional electric double-layer capacitor (EDLC)-based substances (e.g., graphene, hollow carbon) and pseudocapacitive materials (e.g., transition-metal oxides, sulfides, nitrides). Moreover, the corresponding electrochemical performances, reaction mechanisms, emerging challenges and future perspectives are briefly discussed and summarized. This review presents the progress in the reasonable design and preparation of nickel sulfides and their applications in electrochemical capacitors. The corresponding electrochemical performances, reaction mechanisms, emerging challenges, and future perspectives are briefly discussed and summarized.

中文翻译：

---

用于高性能电化学电容器的硫化镍基储能材料

超级电容器具有高功率密度、优异的循环稳定性和环境友好性，是新兴能源技术领域中备受青睐的储能器件。超级电容器的性能最终受电极材料的影响。近年来，硫化镍因其在超级电容器应用中的特殊优点而引起了广泛的兴趣。然而，电化学活性位点的分布严重限制了它们的电化学性能。通过各种策略取得了显着的改进，例如与导电基材构建协同结构，通过纳米化增强活性位点以及与其他电极材料构建纳米混合结构。本文综述了硫化镍及其复合电极与各种双功能双电层电容器（EDLC）基物质（如石墨烯、空心碳）和赝电容材料（如过渡金属）的合理设计和制备进展。氧化物、硫化物、氮化物）。此外，还简要讨论和总结了相应的电化学性能、反应机制、新出现的挑战和未来前景。本综述介绍了硫化镍的合理设计和制备及其在电化学电容器中的应用的进展。简要讨论和总结了相应的电化学性能、反应机制、新出现的挑战和未来前景。