Abstract The synergistic effect between noble metal and spinel-type compounds is beneficial for enhancing the electrochemical performance in a Li–O2 battery. Herein, Ru-impregnated needle-like NCO embedded in porous carbon textiles (CTs) (x wt% Ru@NCO/CTs (x = 0, 0.5, 1, 2, and 5)) is applied as a flexible and binder-free O2 electrode for Li–O2 batteries. The NCO structure can benefit to the Li+ migration, O2 diffusion, and Li2O2 accommodation. The Ru nanoparticles can promote OER and ORR reaction kinetics and lower the overpotential. A flexible Li–O2 cell with 1 wt% Ru@NCO/CTs exhibits a good cyclic stability of 360 cycles with an overpotential of 0.78 V at a constant current density of 200 mA/g, a considerable rate performance, a high reversibility with the Li2O2 formation and its reverse decomposition, and a good flexibility stability under bending and twisting at the different conditions. This work can contribute to the development of electrode material and its architecture design for portable and wearable devices.

中文翻译：

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Ru浸渍针状NiCo2O4嵌入碳纺织品中作为柔性Li-O2电池的O2电极

摘要 贵金属与尖晶石型化合物之间的协同效应有利于提高锂氧电池的电化学性能。在此，嵌入多孔碳纺织品（CTs）（x wt% Ru@NCO/CTs（x = 0、0.5、1、2和5））中的Ru浸渍针状NCO被用作柔性且无粘合剂Li-O2 电池的 O2 电极。NCO 结构有利于 Li+ 迁移、O2 扩散和 Li2O2 调节。Ru纳米颗粒可以促进OER和ORR反应动力学并降低过电位。具有 1 wt% Ru@NCO/CTs 的柔性 Li-O2 电池表现出 360 次循环的良好循环稳定性，在 200 mA/g 的恒定电流密度下具有 0.78 V 的过电位，相当大的倍率性能，与Li2O2 的形成及其逆分解，在不同条件下弯曲和扭曲下具有良好的柔韧性稳定性。这项工作有助于开发用于便携式和可穿戴设备的电极材料及其架构设计。