Zn-Co bimetallic oxide (ZCO) nanowire forests were grown on carbon nanotube (CNT) fibers by a hydrothermal method and the resulting hybrid fiber was used to construct an all solid high energy density fiber-shaped supercapacitor (FSSC). Results indicated that the electrochemical performance of the hybrid fiber was greatly improved due to a synergistic effect between ZnO_x, CoO_x and the CNT fiber. The ZnO_x and CNTs are electrically conductive species that increase the utilization rate of the pseudocapacitive CoO_x while the acid-oxidized CNTs provide active sites for the growth of high-density aligned ZCO nanowire forests. The hybrid fiber reaches a high capacitance of 112.67 mF·cm⁻² and an energy density of 12.68μwh·cm⁻² at a power density of 0.45 mw·cm⁻². Its capacitance retention is 90.63% after 10 000 cycles at a current density of 1 mA·cm⁻², showing good cycling stability. The changes in the cyclic voltammetry curve and capacitance at several different bending angles are negligible, indicating its excellent flexibility and mechanical stability. These outstanding features of the FSSC are attractive for developing portable and wearable electronic devices.

通过水热法在碳纳米管（CNT）纤维上生长Zn-Co双金属氧化物（ZCO）纳米线森林，并将所得的杂化纤维用于构建全固态高能量密度纤维状超级电容器（FSSC）。结果表明，杂化纤维的电化学性能由于ZnO _x，CoO _x和CNT纤维之间的协同作用而大大提高。ZnO _x和CNT是导电物质，可提高伪电容CoO _x的利用率，而酸氧化的CNT为高密度排列的ZCO纳米线森林的生长提供了活性位点。混合光纤的电容达到112.67 mF·cm ^-2在0.45mw·cm ^-2的功率密度下的能量密度为12.68μwh ·cm ^-2。在1mA·cm ^-2的电流密度下，经过10000次循环后，其电容保持率为90.63％，显示出良好的循环稳定性。循环伏安曲线和电容在几个不同弯曲角度的变化可以忽略不计，表明它具有出色的柔韧性和机械稳定性。FSSC的这些出色功能对于开发便携式和可穿戴电子设备具有吸引力。