Carbon nanotubes/iron oxyhydroxide (CNTs/FeOOH) three-dimensional hybrid with shell/core nanostructure is designed as a binder-free electrode for the flexible supercapacitor (SC) application. The coiled and dense CNT forest is preferentially fabricated on flexible carbon fiber cloth (CC) by chemical vapor deposition (CVD) and employed as a highly conductive carrier for electrodeposition growth of FeOOH. The average diameter and length of the single CNT are 30–60 nm and 2–3 μm. The shell/core structured CNTs/FeOOH three-dimensional hybrid maintains the consistent interconnecting network morphology, contributing to overcoming the problem of poor conductivity of FeOOH and the transmission of electron channels and the diffusion of electrolyte ions. The CNTs/FeOOH hybrid exhibits a high mass-specific capacitance of 824 F g⁻¹ (or 0.59 F cm⁻²) in 1 M Na₂SO₄ electrolyte at 0.5 mA cm⁻². By increasing the FeOOH deposition weight, the enhanced area-specific capacitance of 0.892 F cm⁻² (or 564 F g⁻¹) is obtained at 0.5 mA cm⁻², and the enhanced capacitance retention can reach 96% after 3000 charge/discharge cycles. Besides, a flexible SC is fabricated using the CNTs/FeOOH hybrid electrode and carboxymethyl cellulose (CMC)/Na₂SO₄ gel electrolyte. The SC displays an energy density as high as 13.33 Wh kg⁻¹ at a power density of 1000 W kg⁻¹. The SC device shows large bending deformation, and these SC devices pack can drive a red diode to work. These results provide such a shell/core structured CNTs/FeOOH three-dimensional hybrid that can be used as potential and low-cost electrode material for flexible SC.

具有壳/核纳米结构的碳纳米管/羟基氧化铁（CNTs / FeOOH）三维杂化物被设计为柔性超级电容器（SC）应用的无粘合剂电极。卷曲且致密的CNT林优先通过化学气相沉积（CVD）在柔性碳纤维布（CC）上制成，并用作高导电性载体，用于FeOOH的电沉积生长。单个CNT的平均直径和长度为30-60 nm和2-3μm。壳/核结构的CNT / FeOOH三维杂化体保持一致的互连网络形态，有助于克服FeOOH电导率差，电子通道传输和电解质离子扩散的问题。CNT / FeOOH杂化物表现出824 F g ^-1的高质量比电容（或0.59厘米˚F ^-2）在1M的Na ₂ SO ₄电解质在0.5毫安厘米^-2。通过增加FeOOH沉积重量，在0.5 mA cm ^-2时可获得0.892 F cm ^-2（或564 F g ^-1）的面积比电容增强，经过3000次充放电，电容保持率可达到96％。周期。此外，使用CNTs / FeOOH杂化电极和羧甲基纤维素（CMC）/ Na ₂ SO ₄凝胶电解质制备了柔性SC 。所述SC显示器的能量密度高达13.33瓦千克^-1在1000的功率密度钨千克^-1。SC设备显示出很大的弯曲变形，这些SC设备组件可以驱动红色二极管工作。这些结果提供了这种壳/核结构的CNT / FeOOH三维杂化物，可用作柔性SC的潜在且低成本的电极材料。