A NiCo₂O₄ nanowire/NiCo₂O₄ nanosheet composite with a nanostructure was fabricated on nickel foam for use in high-performance supercapacitors by using two-step solution-based approaches such as hydrothermal and chemical bath deposition methods. In this study, the supercapacitive performance of NiCo₂O₄ nanowires was compared with that of NiCo₂O₄ nanowire/NiCo₂O₄ nanosheet arrays in a 2 M KOH electrolyte. The electrochemical study shows that NiCo₂O₄ nanowires/NiCo₂O₄ nanosheets exhibit higher electrochemical performance than NiCo₂O₄ nanowires. The NiCo₂O₄ nanowires/NiCo₂O₄ nanosheets (1866 F/g) have a high specific capacitance than NiCo₂O₄ nanowires (1023 F/g), at 2 A/g. Further, NiCo₂O₄ nanowire/NiCo₂O₄ nanosheet arrays show high electrochemical cycling stability of 94.8% over 5,000 cycles. This enhanced electrochemical performance is attributed to the hierarchically arranged morphology of the NiCo₂O₄ nanowire/NiCo₂O₄ nanosheet composite, which provides a large number of active sites for redox reactions, and fast ion-transfer ability.

通过使用两步溶液法（如水热法和化学浴沉积法），在泡沫镍上制造了具有纳米结构的 NiCo ₂ O ₄纳米线/NiCo ₂ O ₄纳米片复合材料，用于高性能超级电容器。在本研究中，将 NiCo 2 O 4 纳米线的超级电容性能与 NiCo 2 O 4 纳米线/NiCo 2 O ₄纳米_片阵列_在2 _M KOH_电解液中_{的超级电容性能进行了比较。}电化学研究表明NiCo ₂ O ₄纳米线/NiCo ₂ O ₄纳米片表现出比NiCo ₂ O ₄纳米线更高的电化学性能。NiCo ₂ O ₄纳米线/NiCo ₂ O ₄纳米片(1866 F/g)具有比NiCo ₂ O ₄纳米线(1023 F/g)高的比电容，为2 A/g。此外，NiCo ₂ O ₄纳米线/NiCo ₂ O ₄纳米片阵列在5,000次循环中表现出94.8%的高电化学循环稳定性。这种增强的电化学性能归因于 NiCo ₂ O ₄纳米线/NiCo _{2的分层排列形态}O ₄纳米片复合材料，为氧化还原反应提供了大量的活性位点，并具有快速的离子转移能力。