Trimetallic Zeolitic imidazolite framework-derived Co nanoparticles@CoFe-nitrogen-doped porous carbon as bifunctional electrocatalysts for Zn-air battery

Searching for high active, low cost and durable catalysts for oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) remains challenge in developing metal-air battery cathodes. Herein, we proposed a novel bifunctional catalyst derived from the pyrolysis of Co/Fe/Zn trimetallic zeolitic imidazolite framework. The obtained [email protected]0.01NC catalyst displays desirable activity for both ORR and OER (E1/2 = 0.844 V, Ej=10 = 1.654 V). The Zn-air battery equipped with [email protected]0.01NC catalyst on the cathode exhibits a high peak power density of 174.1 mW cm−2, which is much superior than that of commercial 20% Pt/C (87.6 mW cm−2). Significantly, the designed [email protected]0.01NC presents an outstanding stability for over 100 h in rechargeable Zn-air battery.