Copper oxide has aroused great concern in energy storage fields due to its properties of high theoretical capacitance, low cost and mild toxicity. However, its wide application still remains challenges owing to its poor electrical conductivity and unstable cycling life. Binder-free foam electrodes possess abundant porous structures and high specific surface area, which could get good contact with electrolyte. Herein, we demonstrate Ag nanoparticles decorated Cu_xO nanowires grown spontaneously on copper foam (CF) electrode for asymmetric supercapacitor. The skeleton structure of CF provides large amounts of active sites for the growth of Cu_xO nanowires. Moreover, Ag nanoparticles further decrease the internal resistance and enhance the electrochemical performance. Ag/Cu_xO/CF-40 electrode presents a high area specific capacitance of 1192 mF cm⁻² at 2 mA cm⁻² and the influence of surface capacitance-dominated process and diffusion-controlled process are discussed in detail. Besides, the energy density of the as-prepared asymmetric supercapacitor (ASC) reaches 46.32 μWh cm⁻² at a power density of 3.00 mW cm⁻². A 2V LED is lighted successfully by two ASC in series. This work provides a new strategy to prepare low internal resistance and binder-free flexible Ag/Cu_xO/CF electrode, which demonstrates a good potential application in flexible supercapacitors or other wearable electronic devices.

氧化铜由于其高理论电容，低成本和轻度的毒性而在能量存储领域引起了极大的关注。然而，由于其差的电导率和不稳定的循环寿命，其广泛应用仍然是挑战。无粘结剂的泡沫电极具有丰富的多孔结构和高比表面积，可与电解质良好接触。在这里，我们演示了银纳米粒子装饰的铜_x O纳米线自发地生长在不对称超级电容器的泡沫铜（CF）电极上。CF的骨架结构为Cu _x O纳米线的生长提供了大量的活性位点。而且，Ag纳米颗粒进一步降低了内阻并增强了电化学性能。银/铜_xO / CF-40电极在2 mA cm ^-2时呈现出1192 mF cm ^-2的高面积比电容，并详细讨论了表面电容为主的工艺和扩散控制工艺的影响。此外，所制备的不对称超级电容器（ASC）的能量密度在3.00mW cm ^-2的功率密度下达到46.32μWhcm ^-2。2V LED由两个串联的ASC成功点亮。这项工作为制备低内阻和无粘合剂的柔性Ag / Cu _x O / CF电极提供了一种新策略，这证明了在柔性超级电容器或其他可穿戴电子设备中的良好应用潜力。