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

A reduced graphene oxide encapsulating Fe 6 Ni 20 Co 2 Mn 2 Cu 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 Fe 6 Ni 20 Co 2 Mn 2 Cu 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 . In this study, we design a multi-layer reduced graphene oxide catalyst with high crystallinity encapsulating a high-entropy alloy structure.