In recent years, electronic waste (e‐waste) such as old cable wires, fans, circuit boards, etc., can be often seen in large piles of leftover in dumping yards. Employing these e‐waste sources for energy storage devices not only increases the economic value but also decreases the reliance on fossil fuels. In this context, waste cable wires are utilized to obtain precious copper (Cu) fibers and used as a cost‐effective current collector for the fabrication of fiber‐based hybrid supercapacitor (FHSC). With the braided Cu fibers, forest‐like nickel oxide nanosheet grafted carbon nanotube coupled copper oxide nanowire arrays (NiO NSs@CNTs@CuO NWAs/Cu fibers) are designed via simple wet‐chemical approaches. As a battery‐type material, the forest‐like NiO NSs@CNTs@CuO NWAs/Cu fiber electrode shows superior electrochemical properties including high specific capacity (230.48 mA h g⁻¹) and cycling stability (82.72%) in aqueous alkaline electrolyte. Moreover, a solid‐state FHSC is also fabricated using forest‐like NiO NSs@CNTs@CuO NWAs/Cu fibers as a positive electrode and activated carbon coated carbon fibers as a negative electrode with a gel electrolyte, which also shows a higher energy and power densities of 26.32 W h kg⁻¹ and 1218.33 W kg⁻¹, respectively. The flexible FHSC is further employed as an energy source for various electronic gadgets, demonstrating its suitability for wearable applications.

中文翻译：

---

将废电缆线用于高性能的基于光纤的混合超级电容器：一种有效的电子废物管理方法

近年来，经常在堆放场的大堆剩菜中看到旧电缆，风扇，电路板等电子垃圾（电子垃圾）。将这些电子废物来源用于储能设备不仅增加了经济价值，而且减少了对化石燃料的依赖。在这种情况下，废电缆线被用来获得贵重的铜（Cu）纤维，并被用作制造基于纤维的混合超级电容器（FHSC）的具有成本效益的集电器。使用编织的铜纤维，通过简单的湿化学方法设计了森林状的氧化镍纳米片接枝碳纳米管耦合的氧化铜纳米线阵列（NiO NSs @ CNTs @ CuO NWAs / Cu纤维）。作为电池型材料，^-1）和碱性水溶液中的循环稳定性（82.72％）。此外，固态FHSC还使用像森林一样的NiO NSs @ CNTs @ CuO NWAs / Cu纤维作为正电极，而涂有活性炭的碳纤维作为负电极（带有凝胶电解质）制成，这也显示出更高的能量和功率密度分别为26.32 W h kg ^-1和1218.33 W kg ^-1。柔性FHSC还被用作各种电子产品的能源，证明了其适用于可穿戴应用。