Because of high electrical conductivity, theoretical capacity, and numerous redox pairs, NiCo₂S₄ has sparked a lot of interest in energy storage. In the paper, with citric acid as inductive agent, NiCo₂S₄ mesoporous microspheres have been successfully prepared via solvothermal approach by regulating the solvent ratio (water/ethanol ratio = 1/3). It reveals that citric acid dominate in the nucleation and orientated growth of NiCo₂S₄ and the morphology of NiCo₂S₄ with different submicron structures can be tuned by the ratio of water/ethanol. The morphology, structure, and electrochemical properties of all NiCo₂S₄ samples have been investigated. Among these samples, NiCo₂S₄ mesoporous microspheres display the best electrochemical properties due to their unique mesoporous structure and high specific area. It has a high discharge capacity of 857C/g at a current density of 1 A/g, and exhibit exceptional rate capability (80 % retention even at 20 A/g). Additionally, when employed as positive of an asymmetric NiCo₂S₄//active carbon (AC) supercapacitor, it yields an energy density of 48.7 Wh kg⁻¹ at 801 W kg⁻¹ and 81 % capacity retention after 10,000 cycles at a current density of 5 A/g. The work describes a quick and easy way to increase the performance of NiCo₂S₄ electrode materials and demonstrates its potential in practical application.

由于高电导率、理论容量和大量氧化还原对，NiCo ₂ S ₄引起了人们对储能的极大兴趣。本文以柠檬酸为诱导剂，通过调节溶剂比（水/乙醇比=1/3），通过溶剂热法成功制备了NiCo ₂ S _{4介孔微球。}结果表明柠檬酸在NiCo 2 S 4 的成核和取向生长中起主导作用，不同亚微米结构的NiCo ₂ S _4的形貌_可以通过水/乙醇的比例来调节。_{所有 NiCo 2}的形貌、结构和电化学性能S ₄样品已被研究。在这些样品中，NiCo ₂ S ₄介孔微球由于其独特的介孔结构和高比面积而显示出最好的电化学性能。它在 1 A/g 的电流密度下具有 857C/g 的高放电容量，并表现出卓越的倍率性能（即使在 20 A/g 下仍保持 80%）。此外，当用作不对称 NiCo ₂ S ₄ //活性炭 (AC) 超级电容器的正极时，它在 801 W kg ^{-1下产生 48.7 Wh kg -1}的能量密度，在电流下循环 10,000 次后容量保持率为 81%密度为 5 A/g。这项工作描述了一种快速简便的方法来提高镍钴合金的性能₂ S ₄电极材料，并展示了其在实际应用中的潜力。