Facile Composition of CoNi and Graphene as a Free-Standing Cathode for a High-Performance Solid-State Zinc–Air Battery

Jian Hu, Yuan Liu (), Tian Han, Lei Xu and Ningkang Sun
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Jian Hu: School of Physics and Electronic Engineering, Jiangsu University, Zhenjiang 212013, China
Yuan Liu: School of Physics and Electronic Engineering, Jiangsu University, Zhenjiang 212013, China
Tian Han: School of Physics and Electronic Engineering, Jiangsu University, Zhenjiang 212013, China
Lei Xu: School of Physics and Electronic Engineering, Jiangsu University, Zhenjiang 212013, China
Ningkang Sun: School of Physics and Electronic Engineering, Jiangsu University, Zhenjiang 212013, China

Energies, 2024, vol. 17, issue 9, 1-11

Abstract: The development of solid-state zinc–air batteries (SZABs) has stimulated significant interest. However, the practical use of SZABs still encounters difficulties due to the complicated preparation process and low-performance air cathode. In this study, we developed a free-standing CoNi/graphene composite cathode without current collectors and binders. The simplified cathode structure decreased the preparation process, and the self-assembled conductive matrix increased charge transfer, which holds promise for facile preparation and high-performance SZABs. Specifically, a free-standing CoNi/graphene film was fabricated by a simple composition method. The CoNi/graphene electrocatalyst exhibited comparable oxygen reduction reaction (ORR) catalytic activity to that of Pt/C. Furthermore, the CoNi/graphene film could be directly used as a cathode, which showed an open-circuit voltage of 1.41 V and a power density of 210 mW cm −2 in alkaline liquid ZABs, as well as an open-circuit voltage of 1.43 V and a power density of 40 mW cm −2 in alkaline SZABs. This facile preparation and excellent performance offer substantial potential for practical SZAB applications.

Keywords: free-standing integrated electrode; non-precious metal catalyst; graphene oxide; solid-state zinc–air batteries (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2024
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