Layered double hydroxides (LDHs) are a kind of classic pseudocapacitive materials with lamellar structure and large specific surface area, which have attracted swinging attention in the electrochemical energy storage area. The CoS₂@Ni is synthesized through a hydrothermal process, followed by surface generation of the flower-like nickel-iron layered double hydroxide (NiFe-LDH) nanospheres through a hydrothermal process, which is directly used to design a binder-free electrode with a splendid capacitance capability. The as-synthesized NiFe-LDH@CoS₂@Ni electrode presents an outstanding specific capacitance of 11.28 F cm⁻² (3880 F g⁻¹) at 2 mA cm⁻² (1.17 A g⁻¹) in a three electrodes system. Also, the all-solid-state asymmetric supercapacitor (ASC) is combined utilizing the NiFe-LDH@CoS₂@Ni hybrid as the positive electrodes and active carbon covered Ni foam as negative electrodes, respectively. The as-fabricated ASC exhibits a high energy density of 15.84 Wh kg⁻¹ at the power density of 375.16 W kg⁻¹ and can be able to lighten a blue LED indicator for more than 30 min, revealing that the prepared NiFe-LDH@CoS₂@Ni owns great potential in the aspect of practical applications. Therefore, the prepared NiFe-LDH@CoS₂@Ni with outstanding electrochemical properties could be applied for high-performance supercapacitors.

层状双氢氧化物（LDHs）是一种具有层状结构和大比表面积的经典伪电容材料，在电化学储能领域引起了广泛的关注。CoS ₂ @Ni是通过水热工艺合成的，然后通过水热工艺表面生成花状镍铁层双氢氧化物（NiFe-LDH）纳米球，该表面直接用于设计具有出色的电容能力。刚合成的NiFe-LDH @ CoS ₂ @Ni电极在2 mA cm ^-2（1.17 A g ^-1）下具有11.28 F cm ^-2（3880 F g ^-1）的出色比电容。）在三电极系统中。而且，全固态不对称超级电容器（ASC）分别利用NiFe-LDH @ CoS ₂ @Ni杂化物作为正电极和活性炭包覆的Ni泡沫作为负电极进行组合。制成的ASC在375.16 W kg ^-1的功率密度下显示出15.84 Wh kg ^-1的高能量密度，并且能够点亮蓝色LED指示器超过30分钟，表明制备的NiFe-LDH @ CoS ₂ @Ni在实际应用方面具有巨大潜力。因此，所制备的具有优异电化学性能的NiFe-LDH @ CoS ₂ @Ni可用于高性能超级电容器。