Key Words:ELECTROCATALYST; GRAPHENE; EFFICIENT; MEMBRANE; CATHODE; FE

Abstract:Herein, a unique carbon sponge FeNC@GA-MF with a hierarchical porous structure was prepared by a multi-step self-assembly strategy, with a high surface area of 1184.8 m2 g-1, a pseudocapacitance of 133.5 F g-1, and also superior activity for the oxygen reduction reaction (E1/2 = 0.866 VRHE). The Zn-air battery fabricated with the FeNC@GA-MF cathode delivers a peak power density of 156 mW cm-2 and a satisfied stability, outperforming the Pt/C cathode, benefiting from the high intrinsic activity and large surface area of the unique hierarchical porous structure. This work provides an effective strategy to fabricate self-supporting electrodes for fuel cells and supercapacitors.

Volume:36

Issue:15

Translation or Not:no