Abstract

Supercapacitors (SCs) are currently numbered among the most outstanding energy storage and supply devices due to their high power density, durable cycle life, and wide operating temperature range. However, the wide application of SCs is still subject to the low energy density, which drives researchers to extensively look for high-performance electrode materials. In recent years, nickel sulfide-based materials have been widely studied as promising electrode materials for SCs due to their superior theoretical specific capacity, high redox activity, and rapid electric conduction, but the inferior active material utilization efficiency and poor reaction kinetics limit their practical demand in SCs. In this review, we briefly introduced the energy storage mechanism of nickel sulfide electrode materials used in supercapacitors and then launched an overview of improving performance. A particular emphasis is on the modification strategies to accelerate the electron conduction and mass transfer process through carbon recombination, metal heteroatom doping, interfacial electric field construction, exposure of edge active sites and large specific surface area, and building of ion diffusion channels. Finally, we discuss the research orientation of nickel sulfide-based electrode materials.

摘要

超级电容器（SC）因其高功率密度、持久的循环寿命和宽工作温度范围而被列为目前最出色的能量存储和供电设备之一。然而，SCs的广泛应用仍然受到能量密度较低的影响，这促使研究人员广泛寻找高性能电极材料。近年来，硫化镍基材料因其优越的理论比容量、高氧化还原活性和快速导电性而被广泛研究作为有前途的SCs电极材料，但较差的活性材料利用率和较差的反应动力学限制了其实际应用SC 的需求。在这篇评论中，我们简要介绍了用于超级电容器的硫化镍电极材料的储能机理，然后对性能改进进行了概述。特别强调通过碳复合、金属杂原子掺杂、界面电场构建、边缘活性位点和大比表面积的暴露以及离子扩散通道的构建来加速电子传导和传质过程的改性策略。最后讨论了硫化镍基电极材料的研究方向。边缘活性位点的暴露和大的比表面积，以及离子扩散通道的构建。最后讨论了硫化镍基电极材料的研究方向。边缘活性位点的暴露和大的比表面积，以及离子扩散通道的构建。最后讨论了硫化镍基电极材料的研究方向。