Unlocking ultra-long stability of Zn–air batteries: synergistic role of antiperovskite carbide Fe3SnC and Fe3C nanoparticles in enhancing electrocatalytic performance

A new ORR electrocatalyst, FeSn-NC, was synthesized by anchoring antiperovskite carbide Fe 3 SnC and Fe 3 C nanoparticles on a honeycomb meso-microporous carbon substrate, which exhibited high activity and ultra-long stability in Zn–air batteries.