▎ 摘　　要

To meet the reaction kinetic demands of cathodic electrode in metal-air battery technology, we propose a novel bifunctional catalyst of single iron atoms, single nickel atoms, and core@shell Ni@Fe nanoparticles simultaneously confined in a porous interconnected carbon nanotubes/N-doped graphene nanonetwork (NiSAFeSA- Ni@Fe-NPs/CNTs-NGNS). The optimized NiSAFeSA-Ni@Fe-NPs/CNTs-NGNS catalyst exhibits excellent electrocatalytic activities, affording a positive onset potential of + 0.92 V along with a favorable 4e(-) pathway for ORR while delivering a low overpotential (eta) of 309 mV at 10 mA cm(-2) for OER in alkaline medium. The synergistic effects caused by the enhanced OER and ORR allow the NiSAFeSA-Ni@Fe-NPs/CNTs-NGNS air-cathode to produce high-performance Zn- and Al-air batteries with exceptional cell voltage, power density, and durability, surpassing most materials reported so far. The developed Zn- and Al-air batteries deliver cell voltages of 1.41 and 1.61 V with high power density of 163 and 184 mW cm(-2), respectively. Furthermore, they exhibit a stable cell voltage even after undergoing deformation testing and long-term charge-discharge operation of 170 h. This work suggests a promising candidate for high-performance metal-air battery applications.