The development of cost‐effective efficient bifunctional electrocatalysts for metal‐air batteries is an important aspect for its commercialization. We demonstrate the effect of Co nanoparticles and/or the porous carbon matrix in pristine CoFe₂O₄ (CFO) electrocatalysts towards the oxygen reduction reaction (ORR) and the oxygen evolution reaction (OER). The Co/CoFe₂O₄‐carbon network (CCFOC) with a high surface area and good conductivity offered more active sites for oxygen adsorption as well as accelerated electron transfer kinetics, leading to superior ORR and OER activities. A Li‐air battery split cell was fabricated using the CCFOC as an air‐breathing electrode, which exhibited a high discharge capacity of 4320 mAh g⁻¹ at a high current density of 100 mA g⁻¹ with an acceptable cycling stability and columbic efficiency. The fabricated coin cell or the split cell Li‐air battery could power a commercial 2.8 V green LED bulb continuously for more than 6 h.

中文翻译：

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CoFe2O4上用钴装饰的多孔碳网络，作为高容量可充电锂空气电池的空气呼吸电极：金属钴纳米粒子的作用

用于金属-空气电池的具有成本效益的高效双功能电催化剂的开发是其商业化的重要方面。我们证明原始的CoFe ₂ O ₄（CFO）电催化剂中的Co纳米颗粒和/或多孔碳基质对氧还原反应（ORR）和氧释放反应（OER）的影响。具有高表面积和良好电导率的Co / CoFe ₂ O ₄碳网络（CCFOC）为氧吸附提供了更多的活性位点，并加速了电子转移动力学，从而带来了卓越的ORR和OER活性。使用CCFOC作为空气呼吸电极制造了一个锂空气电池分离式电池，该电池具有4320 mAh g ^-1的高放电容量在100 mA g ^-1的高电流密度下具有可接受的循环稳定性和库仑效率。制成的纽扣电池或分体式锂离子电池可以为商用2.8 V绿色LED灯泡连续供电超过6小时。