The core-shell-like architectures consisting of NiO nanosheet arrays grafted Co₃O₄-NiO fish thorns-like nanostructures (NiO [email protected]₃O₄-NiO FTNs) were successfully prepared by a simple solution-based method. With an aid of ammonium fluoride (NH₄F), the morphological evolution of Co₃O₄-NiO FTNs was elaborated effectively. Subsequently, the NiO NSAs were uniformly decorated on the Co₃O₄-NiO FTNs to form a core-shell-like composite material for positive electrode in hybrid supercapacitors (HSCs). The core-shell-like composite exhibited a large surface area with high open porous channels, which intends to deliver high areal capacity of 313.9 μA h/cm² (at 4 mA/cm²) in 1 M KOH, and it is 1.84 and 3.9 times higher than the Co₃O₄-NiO FTNs and solitary NiO NSAs electrodes. Furthermore, we fabricated a pouch-type HSC with core-shell-like NiO [email protected]₃O₄-NiO FTNs as a positive electrode and activated carbon as a negative electrode in aqueous alkaline electrolyte. At a current density of 2 mA/cm², the fabricated HSC provides high areal capacitance of 623.5 mF/cm² with a maximum energy density of 216.1 μW h/cm² and power density of 27.7 mW/cm². In addition, the HSC showed superior cycling stability with a capacity retention of 126% after 5000 cycles, indicating the great promise of practical applications. Thanks to the comprehensive electrochemical performance, the pouch-type HSCs effectively operated a toy motor fan and light-emitting diode bulb for real-life applications.

通过基于溶液的简单方法成功地制备了由NiO纳米片阵列接枝Co ₃ O ₄ -NiO鱼刺状纳米结构（NiO [受电子邮件保护] ₃ O ₄ -NiO FTNs）组成的核-壳状结构。借助氟化铵（NH ₄ F），有效地阐明了Co ₃ O ₄ -NiO FTNs的形貌演化。随后，将NiO NSA均匀地装饰在Co ₃ O _4上-NiO FTN形成混合超级电容器（HSC）中正极的核壳状复合材料。核-壳状复合材料具有大表面积和高开放性的多孔通道，旨在在1 M KOH中提供313.9μAh / cm ²（在4 mA / cm ^2时）的高面积容量，其为1.84和比Co ₃ O ₄ -NiO FTN和单独的NiO NSAs电极高3.9倍。此外，我们在碱性水溶液中，以核壳状的NiO [电子邮件保护] ₃ O ₄ -NiO FTNs为正极，活性炭为负极，制成了袋型HSC 。在2 mA / cm ²的电流密度下，所制造的HSC可提供623.5 mF / cm ^2的高面积电容，最大能量密度为216.1μWh / cm ²，功率密度为27.7 mW / cm ²。此外，HSC表现出卓越的循环稳定性，经过5000次循环后容量保持率达到126％，这表明了实际应用的巨大希望。由于具有全面的电化学性能，袋式HSC可以有效地运行玩具马达风扇和发光二极管灯泡，以用于实际应用。