Reasonable design and feasible synthesis of catalysts with high efficiency for oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) are urgent demand, but remain a challenge in achieving extensive application of metal-air battery. In this work, we utilized the gas-foaming way to synthesize uniformly dispersed Co nanoparticles (Co NPs) anchored on 3D spiral-like polyhedron N-doped porous carbon structure. The optimized catalyst (CoSP-850-10) delivers prominent ORR activity with half-wave potential of 0.85 V and kinetic current density of 27 mA cm⁻². Importantly, it also demonstrates satisfactory bifunctional performance with low overpotential. Furthermore, the Al-air battery with CoSP-850-10 offers remarkable specific capacity of 1670 mAh g⁻¹ at 200 mA cm⁻². The Zn-air battery delivers a stable working voltage of 1.25 V at 10 mA cm^-2 and remarkable rechargeable performance with high initial cycle efficiency of 60.5% and long-term stability under 20 mA cm⁻².

对于氧还原反应（ORR）和析氧反应（OER）的高效催化剂的合理设计和可行的合成是迫切的需求，但是在实现金属空气电池的广泛应用方面仍然是一个挑战。在这项工作中，我们利用气体发泡方法合成了锚固在3D螺旋状多面体N掺杂多孔碳结构上的均匀分散的Co纳米颗粒（Co NPs）。优化的催化剂（CoSP-850-10）具有出色的ORR活性，半波电势为0.85 V，动电流密度为27 mA cm ^-2。重要的是，它还显示出令人满意的双功能性能，且低电势较低。此外，带有CoSP-850-10的Al-air电池 在200 mA cm ^-2时可提供1670 mAh g ^-1的显着比容量。锌空气电池在10 mA cm ^-2时可提供1.25 V的稳定工作电压，并具有出色的可充电性能，初始循环效率高达60.5％，在20 mA cm ^-2下具有长期稳定性。