Asymmetric supercapacitors have emerged as one of the most appropriate energy storage systems. Enhancing the specific capacity of electrode materials at high current densities is a critical issue in asymmetric capacitors. Herein, we optimized a simple strategy to develop partial reduced hierarchical nanosheets shaped nickel-cobalt layered double hydroxide with Ag nanoparticles for efficient charge storage. The composite cathodes are prepared using a mild hydrothermal method followed by a liquid phase reduction process. Benefiting from the electric conductivity tuning, the hybrids reveal better capacitive performances. Among all, the nickel-cobalt layered double hydroxide with 5 wt.% Ag decoration presents a high specific capacitance of 1338 F g ^− 1 at a current density of 10 A g ^− 1 with a good capacity retention of 660 F g ^− 1 at 60 A g ^− 1, implying its fascinating rate capability. Besides, the established capacitor device achieves an energy density of 43.07 Wh kg⁻¹ at a power density of 400 W kg⁻¹. Interestingly, the device exhibits excellent long-term durability for 10,000 consecutive cycles of repeated charge-discharge processes at 12.5 A g ^− 1 with a capacity retention of 89.6%. Such a high performance suggests a practical and feasible approach as three-dimensional (3D) electrode tailoring for sustainable energy storage devices.

非对称超级电容器已经成为最合适的储能系统之一。在不对称电容器中，在高电流密度下提高电极材料的比容量是一个关键问题。在这里，我们优化了一种简单的策略，以开发具有Ag纳米颗粒的部分还原的分层纳米片状镍钴层状双氢氧化物，以进行有效的电荷存储。使用温和的水热法，然后进行液相还原法来制备复合阴极。得益于电导率调节，混合动力车具有更好的电容性能。在所有的镍-钴层状双氢氧化物以5重量％的Ag装饰礼物1338 F A高的比电容。克 ^{-  1}，以10A的电流密度g  ^{-  1}在60 A g ^{- 1}时具有660 F g  ^{-  1}的良好容量保持能力，这表明它具有令人着迷的速率能力。此外，所建立的电容器装置在400 W kg ^-1的功率密度下实现了43.07 Wh kg ^-1的能量密度。有趣的是，装置具有在12.5 A反复充放电过程的万个连续周期优异的长期耐久性克^{- 1}具有89.6％的容量保持率。如此高的性能表明了一种实用且可行的方法，例如为可持续能源存储设备定制三维（3D）电极。