Portable and wearable electronic devices have gained increasing popularity in recent years. However, they usually suffer from all kinds of local stress under mechanical deformation, which is inevitable and even causes permanent mechanical deformation over time. Herein, we report a novel shape recovery electrode material derived from the naturally occurring Juncus effusus (JE). Remarkably, the fiber-shaped JE exhibits unique three-dimensional (3D) reticular and hollow tubular microstructures. In order to provide JE with energy storage capability, the active materials, namely carbon nanotubes (CNTs) and polyaniline (PANI), were successively deposited on JE. The as-prepared JE-CNT-PANI was rather flexible and knittable and demonstrated attractive shape recovery properties in water and H₂SO₄ solution. Even if serious deformation occurred, it would recover its original shape very rapidly once immersed in the solvent again. A symmetric supercapacitor (SC) assembled from JE-CNT-PANI fiber electrodes delivered a large specific capacitance of 117.00 F g⁻¹ at a current density of 1 A g⁻¹ (based on the mass of the entire electrode), which was comparable to or even outperformed many early reported two-electrode PANI-based SCs. In addition, the SC could have 112.4% of the original capacitance after 100 times of shape recovery, indicating its excellent electrochemical stability under deformation. These results strongly suggested that JE could potentially become a powerful resource for applications in electrochemical capacitive devices.

近年来，便携式和可穿戴电子设备越来越受欢迎。但是，它们通常在机械变形下会遭受各种局部应力，这是不可避免的，甚至会随着时间的流逝而导致永久性机械变形。在这里，我们报告了一种新型的形状恢复电极材料，该材料源自天然的Juncus effusus（JE）。值得注意的是，纤维状JE表现出独特的三维（3D）网状和中空管状微结构。为了给JE提供储能能力，将活性材料，即碳纳米管（CNT）和聚苯胺（PANI）相继沉积在JE上。所制备的JE-CNT-PANI相当柔韧性和可编织性，并且在水和H _2中显示出有吸引力的形状恢复性能SO ₄解决方案。即使发生了严重的变形，一旦再次浸入溶剂中，它也会迅速恢复其原始形状。由JE-CNT-PANI纤维电极组装而成的对称超级电容器（SC）在1 A g ^-1的电流密度（基于整个电极的质量）下可提供117.00 F g ^-1的大比电容。甚至优于许多早期报道的基于两电极PANI的SC。此外，在形状恢复100次后，SC可能具有原始电容的112.4％，表明其在变形下具有出色的电化学稳定性。这些结果强烈表明，JE可能成为电化学电容设备中强大的资源。