With the rising demand for flexible and wearable electronic devices, flexible power sources with high energy densities are required to provide a sustainable energy supply. Theoretically, rechargeable, flexible Li‐O₂/air batteries can provide extremely high specific energy densities; however, the high costs, complex synthetic methods, and inferior mechanical properties of the available flexible cathodes severely limit their practical applications. Herein, inspired by the structure of human blood capillary tissue, this study demonstrates for the first time the in situ growth of interpenetrative hierarchical N‐doped carbon nanotubes on the surface of stainless‐steel mesh (N‐CNTs@SS) for the fabrication of a self‐supporting, flexible electrode with excellent physicochemical properties via a facile and scalable one‐step strategy. Benefitting from the synergistic effects of the high electronic conductivity and stable 3D interconnected conductive network structure, the Li‐O₂ batteries obtained with the N‐CNTs@SS cathode exhibit superior electrochemical performance, including a high specific capacity (9299 mA h g⁻¹ at 500 mA g⁻¹), an excellent rate capability, and an exceptional cycle stability (up to 232 cycles). Furthermore, as‐fabricated flexible Li‐air batteries containing the as‐prepared flexible super‐hydrophobic cathode show excellent mechanical properties, stable electrochemical performance, and superior H₂O resistibility, which enhance their potential to power flexible and wearable electronic devices.

中文翻译：

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适用于大容量，高速率和稳定的锂电池的血液毛细管启发式，自由放置，灵活且低成本的超疏水N-CNTs @ SS阴极

随着对柔性和可穿戴电子设备的需求不断增长，需要具有高能量密度的柔性电源来提供可持续的能源供应。从理论上讲，可充电，灵活的Li‐O ₂/空气电池可以提供极高的比能量密度；然而，可用的柔性阴极的高成本，复杂的合成方法以及较差的机械性能严重地限制了它们的实际应用。在此，受人体毛细血管组织结构的启发，本研究首次证明了在不锈钢网（N-CNTs @ SS）表面上互穿层级掺杂N的碳纳米管的原位生长。通过灵活且可扩展的一步策略，具有出色的理化特性的自支撑柔性电极。受益于高电子电导率和稳定的3D互连导电网络结构的协同效应，Li-O ₂与N的CNT @ SS阴极表现出优异的电化学性能得到的电池，其中包括一个高的比容量（9299毫安汞柱^-1以500mA克^-1），优异的倍率性能，并作为例外循环稳定性（最多232个循环） 。此外，包含制成的柔性超疏水阴极的预制柔性Li-air电池具有出色的机械性能，稳定的电化学性能和出色的H ₂ O耐受性，从而增强了为柔性和可穿戴电子设备供电的潜力。