Enhanced zinc-ion batteries through the coating of surface-functionalized graphene on the anode: A promising solution for uniform zinc plating

•Surface-functionalized graphene as a protective layer on the anode surface for zinc-ion batteries.•Enhanced electrochemical stability due to the introduction of protective layer.•Efficient ion behaviour between electrolyte and electrode due to increased amount of oxygen-functional groups.•Improved long-term stability due to zinc dendrite suppression.