A multi-layer reduced graphene oxide catalyst encapsulating a high-entropy alloy for rechargeable zinc-air batteries

A reduced graphene oxide encapsulating Fe₆Ni₂₀Co₂Mn₂Cu_1.5@rGO catalyst is prepared using a Joule heating strategy. The graphene-coated layer with high crystallinity enhances the stability of the crystal structure, resulting in superior OER activity. Rechargeable zinc-air batteries with Fe₆Ni₂₀Co₂Mn₂Cu_1.5@rGO demonstrate remarkable performance, boasting a high specific capacity of 800 mA h g_Zn^-1, an impressive peak power density of 154.612 mW cm^-2, and a cycle life of 300 hours at a current density of 10 mA cm^-2.