The combination of layered nanorod arrays with unique core–shell structure and transition metal layered double hydroxide (LDH) is considered as a feasible solution to improve the electrochemical performances of capacitor electrode. In this study, layered ZnNiFe-LDH@Cu(OH)₂/CF core–shell nanorod arrays, which consist of ultrathin ZnNiFe-LDHs nanosheet shells and ordered Cu(OH)₂ nanorod inner cores, are successfully designed and fabricated by a typical hydrothermal way and a simple in situ oxidation reaction. The electrode prepared using ZnNiFe-LDH@Cu(OH)₂/CF nanomaterial reveals an remarkable area capacitance of 6100 mF cm⁻² at 3 mA cm⁻² current density, which is excellently superior than those of ZnFe-LDH@Cu(OH)₂/CF, NiFe-LDH@Cu(OH)₂/CF, Cu(OH)₂/CF and CF. Additionally, the capacitance retention remains as high as 83.4% after 5000 cycles and a very small Rs (0.567 Ω) can be observed. In addition, an asymmetric supercapacitor device is successfully fabricated employing ZnNiFe-LDH@Cu(OH)₂/CF. Meanwhile, the ZnNiFe-LDH@Cu(OH)₂/CF//AC device can achieve an energy density of 44 Wh kg⁻¹ and a corresponding power density of 720 W kg⁻¹ and possess the capability to light up a multi-function monitor for 33 min just using two ASC equipments connected in series. Therefore, the prepared ZnNiFe-LDH@Cu(OH)₂/CF composite materials with unique structure has great application potential in energy storage devices.

具有独特核壳结构的层状纳米棒阵列和过渡金属层状双氢氧化物（LDH）的组合被认为是提高电容器电极电化学性能的可行解决方案。在这项研究中，层状 ZnNiFe-LDH@Cu(OH) ₂ /CF 核壳纳米棒阵列由超薄的 ZnNiFe-LDHs 纳米片壳和有序的 Cu(OH) ₂纳米棒内核组成，成功地设计和制造了一个典型的水热方式和简单的原位氧化反应。使用 ZnNiFe-LDH@Cu(OH) ₂ /CF 纳米材料制备的电极在 3 mA cm ^{-2 下}具有 6100 mF cm ^-2的显着面积电容电流密度，优于ZnFe-LDH@Cu(OH) ₂ /CF、NiFe-LDH@Cu(OH) ₂ /CF、Cu(OH) ₂ /CF和CF。此外，5000 次循环后电容保持率仍高达 83.4%，并且可以观察到非常小的 Rs (0.567 Ω)。此外，采用ZnNiFe-LDH@Cu(OH) ₂ /CF成功制造了不对称超级电容器装置。同时，ZnNiFe-LDH@Cu(OH) ₂ /CF//AC器件可以实现44 Wh kg ^-1的能量密度和720 W kg ^-1的相应功率密度并具有仅使用两个串联的ASC设备即可点亮多功能显示器33分钟的能力。因此，制备的具有独特结构的ZnNiFe-LDH@Cu(OH) ₂ /CF复合材料在储能器件中具有巨大的应用潜力。