Wearable fiber-shaped supercapacitor (SC) is a kind of one-dimensional flexible devices that can be directly knitted or sewn into various kinds of textile soft-substrate for wearable energy storage. Herein, acid-pretreated stainless steel yarn (SSY) has been developed to support electrodeposition of active materials of nickel/cobalt composite and polypyrrole (PPy) as the positive and negative electrodes, respectively. The asymmetric all-solid-state supercapacitors (AASs) showed both high electrochemical properties and excellent mechanical flexibility under various degrees of deformation. The highest volumetric capacitance reached 14.69 F cm⁻³ at the current density of 25 mA cm⁻³, and the maximum energy density was 3.83 mWh·cm⁻³ (0.032 mWh·cm⁻²) at a power density of 18.75 mW cm⁻³ (0.284 mW cm⁻²). The AASs were highly flexible and durable for directly being sewn into textile fabrics, and exhibited a good electrochemical stability under 6000 charging/discharging cycles. This work uses the common materials and facile methods to fabricate the flexible and wearable AASs with enhanced electrochemical properties, showing a decent way in developing flexible SC devices.

耐磨纤维状超级电容器（SC）是一种一维柔性器件，可以直接编织或缝制到各种纺织品软质基底中，以存储可穿戴能量。在此，已经开发了酸预处理的不锈钢丝（SSY）以支持电沉积镍/钴复合材料和聚吡咯（PPy）作为正极和负极的活性材料。非对称全固态超级电容器（AAS）在各种变形程度下均显示出高电化学性能和出色的机械柔韧性。在25 mA cm ^-3的电流密度下，最高体积电容达到14.69 F cm ^-3，并且最大能量密度为3.83 mWh·cm ^-3（0.032 mWh·cm ^-2）的功率密度为18.75 mW cm ^-3（0.284 mW cm ^-2）。AAS具有很高的柔韧性和耐用性，可以直接缝制到织物中，并且在6000次充电/放电循环下表现出良好的电化学稳定性。这项工作使用常见的材料和简便的方法来制造具有增强的电化学性能的柔性和可穿戴AAS，显示了开发柔性SC装置的一种不错的方法。