Supercapacitors (SCs), recognized for their exceptional power and relatively high energy densities, long lifespan, and lower production costs, have emerged as an ideal solution to meet the growing demand for energy storage applications. The performance of supercapacitors is significantly influenced by the choice of electrode materials, making the development of novel materials a key focus in the field of high-performance supercapacitors. Recently, NiCo₂O₄ has attracted considerable attention as an electrode material due to its notable advantages including high theoretical capacity, low cost, natural abundance, easy of synthesis, and excellent electronic conductivity. However, the performance of NiCo₂O₄ is constrained by its low electrical conductivity and limited surface area, which lead to significant capacity degradation. This review article offers a comprehensive overview of the synthesis approaches employed to develop nickel cobaltite and its composites for supercapacitor applications. It details various synthesis methods, including sol-gel, hydrothermal, chemical bath deposition, and electrospinning techniques, with a focus on optimizing synthesis parameters to improve the electrochemical performance of these composites. The review concludes with future perspectives on the advancement of spinel NiCo₂O₄ for use as supercapacitor electrodes.

中文翻译：

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镍钴酸盐纳米结构及其复合材料在超级电容器中的应用综述


超级电容器 （SC） 以其卓越的功率和相对较高的能量密度、较长的使用寿命和较低的生产成本而著称，已成为满足储能应用不断增长的需求的理想解决方案。超级电容器的性能受电极材料选择的显著影响，这使得新型材料的开发成为高性能超级电容器领域的重点。近年来，NiCo₂O₄ 因其理论容量高、成本低、天然丰度高、易于合成和优异的电子导电性等显著优点而作为电极材料引起了相当大的关注。然而，NiCo₂O₄ 的性能受到其低导电性和有限的表面积的限制，这会导致容量显着下降。这篇综述文章全面概述了用于开发用于超级电容器应用的镍钴酸盐及其复合材料的合成方法。它详细介绍了各种合成方法，包括溶胶-凝胶、水热、化学浴沉积和静电纺丝技术，重点是优化合成参数以提高这些复合材料的电化学性能。综述总结了尖晶石 NiCo₂O₄ 用作超级电容器电极的未来前景。