Issue 7, 2023

γ-CD-MOF-derived heterostructures as bifunctional electrocatalysts for rechargeable zinc–air batteries

Abstract

The development of efficient and cost-effective bifunctional electrocatalysts toward the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) is promising for high-performance rechargeable metal–air batteries. In this work, a Co–N,O–C@C3N4 heterostructure catalyst is synthesized via molten salt-assisted pyrolysis of a mixture of cobalt loaded γ-cyclodextrin MOFs and melamine. Benefitting from the synergy of Co–N,O–C and C3N4 in regulating the electrochemical structure, optimized activity is recorded at a current density of 10 mA cm−2 with an overpotential at 290 mV for the OER, and a half-wave potential of 0.84 V for the ORR. Moreover, a rechargeable Zn–air battery with Co–N,O–C@C3N4 as an air electrode exhibits a large open-circuit voltage (1.43 V) with a high peak power density (112 mW cm−2) and long cycle life (over 200 cycles). Therefore, this work provides a new vision for the design and preparation of promising functional electrocatalysts for Zn–air batteries.

Graphical abstract: γ-CD-MOF-derived heterostructures as bifunctional electrocatalysts for rechargeable zinc–air batteries

Supplementary files

Article information

Article type
Paper
Submitted
03 Jän 2023
Accepted
25 Feb 2023
First published
02 Mär 2023

Sustainable Energy Fuels, 2023,7, 1656-1663

γ-CD-MOF-derived heterostructures as bifunctional electrocatalysts for rechargeable zinc–air batteries

R. Chai, X. Sang, S. Ou, J. Li, J. Song and D. Wang, Sustainable Energy Fuels, 2023, 7, 1656 DOI: 10.1039/D3SE00011G

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