The rapid development of wearable and portable smart equipment has led to a research boom in flexible energy storage devices. Herein, NiCo₂O₄ nanosheet arrays have been successfully grown on carbon fibers (CFs), which was firstly modified by the three-dimensional Ni (3D-Ni) to repair the cracks and grooves in the surface of CF. The obtained CFs@3D-Ni/NiCo₂O₄ electrode possesses a high specific capacity of 736 F/g at 1 A/g current density in the three-electrode system. More importantly, the composite showed excellent electrochemistry stability after temperature plummets. The all-solid-state asymmetric supercapacitor device (ASC) assembled by CFs@3D-Ni/NiCo₂O₄ delivers a wonderful specific capacity of 176 F/g, a high energy density 55 W h/Kg at 750 W/Kg, excellent cycling stability (about 97.84% after 2000 cycles), and high flexibility (almost no influence in electrical performance at various bending angles). This work has provided a promising method to prepare high performance of the flexible and lightweight energy storage equipment.

穿戴式和便携式智能设备的快速发展导致了柔性储能设备的研究热潮。本文中，NiCo ₂ O ₄纳米片阵列已成功地在碳纤维（CFs）上生长，该碳纤维首先被三维Ni（3D-Ni）改性以修复CF表面的裂纹和沟槽。在三电极系统中，电流密度为1 A / g时，所得CFs @ 3D-Ni / NiCo ₂ O ₄电极具有736 F / g的高比容量。更重要的是，该复合材料在温度骤降后显示出优异的电化学稳定性。CFs @ 3D-Ni / NiCo ₂ O ₄组装的全固态非对称超级电容器器件（ASC）具有176 F / g的出色比容量，750 W / Kg的高能量密度55 W h / Kg，出色的循环稳定性（2000次循环后约为97.84％）和高柔韧性（几乎在各种条件下都不会影响电气性能）弯曲角度）。这项工作为制备柔性轻质储能设备的高性能提供了一种有前途的方法。