The flexible electrodes with battery-like capacitive active materials or efficient electrocatalysts are highly desirable for flexible electronics and portable devices. Here we develop a highly flexible Ni₃S₂@Ni/CC electrode via a facile and scalable nickel electroplating and in-situ sulfuration route. When it acts as a supercapacitor electrode, the assembled all-solid-state hybrid supercapacitor delivers a high areal energy density of 0.27 mWh cm^-2 at an areal power density of 4.90 mW cm^-2. Because of its superior mechanical flexibility, the assembled supercapacitor exhibits 88.1% retention of its initial capacitance after 2000 bending cycles from 0° to 90°. Furthermore, the Ni₃S₂@Ni/CC electrode exhibits high activity for oxygen evolution reaction (OER), achieving a benchmark of 10 mA cm^-2 at a relatively low overpotential (η₁₀) of 290.9 mV with a Tafel slope of 101.26 mV dec^-1. Slight increments of 9.9 mV in η₁₀ and 6.55 mV dec^-1 in Tafel slope are obtained even when the electrode is tested under a bending angle of 180°. Meanwhile what it delivers an excellent long-term durability for 30 h that is similar to the electrode without bending for OER. The flexible Ni₃S₂@Ni/CC electrode can be incorporated into wearable electronics and portable water-splitting cells.

具有电池状电容性活性材料或高效电催化剂的柔性电极对于柔性电子设备和便携式设备是非常需要的。在这里，我们通过一种灵活且可扩展的镍电镀和原位硫化方法开发了一种高度灵活的Ni ₃ S ₂ @ Ni / CC电极。当其用作超级电容器电极时，组装的全固态混合超级电容器在4.90 mW cm ^-2的面功率密度下可提供0.27 mWh cm ^-2的高面能量密度。由于其出色的机械柔韧性，组装后的超级电容器在0°至90°的2000个弯曲周期后，仍显示出其初始电容的88.1％保留率。此外，Ni ₃ S ₂@镍/ CC电极表现出对析氧反应（OER）的高活性，实现10毫安厘米的基准^-2在相对低的超电势（η ₁₀ 290.9毫伏）与101.26毫伏分解的塔菲尔斜率^-1。在η9.9毫伏的轻微递增₁₀和6.55毫伏癸^-1在塔菲尔斜率，即使当电极180°的弯曲角度下测试获得。同时，它在30小时内具有出色的长期耐用性，类似于OER无需弯曲的电极。柔性Ni ₃ S ₂ @ Ni / CC电极可以结合到可穿戴电子设备和便携式水分解池中。