1. Interface Engineering of Anti-Perovskite Ni3FeN/VN Heterostructure for High-Performance Rechargeable Zinc–Air batteries.
- Author
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Xu, Li, Wu, Suqin, He, Xiaoyang, Wang, Huan, Deng, Daijie, Wu, Jianchun, and Li, Henan
- Subjects
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STORAGE batteries , *LITHIUM-air batteries , *OXYGEN evolution reactions , *DENSITY functional theory , *CHARGE exchange , *CHARGE transfer , *CATALYTIC activity - Abstract
[Display omitted] • An anti-perovskite Ni 3 FeN/VN heterostructure is designed for Zn-air batteries. • The anti-perovskite Ni 3 FeN with the metallic behavior contributes to electron transfer. • Abundant catalytic active sites are formed at the heterogeneous interface. • The Ni 3 FeN/VN–NG displays excellent bifunctional activity with a ΔE value of 0.69 V. High-performance rechargeable zinc–air battery is highly relying on the efficient and stable bifunctional electrocatalysts. Herein, an anti-perovskite Ni 3 FeN/VN heterostructure encapsulated N–doped graphene (Ni 3 FeN/VN–NG) was synthesized by a two-step transformation of trimetallic NiFeV–layered double hydroxide. The Ni 3 FeN/VN–NG showed excellent bifunctional catalytic activity (ΔE = 0.69 V) and stability. The excellent bifunctional electrocatalytic performance is benefited from the extraordinary catalytic behavior of Ni 3 FeN/VN heterostructure. The intrinsic metallic properties and remarkable superconductivity of anti-perovskite Ni 3 FeN can enhance the electrocatalytic performance. Density functional theory calculations confirm that the electronic coupling between Ni 3 FeN and VN facilitates the charge transfer between the two components, simultaneously generates abundant catalytic active sites at the heterogeneous interface. When the Ni 3 FeN/VN–NG was used as the air cathode, in zinc–air battery, the zinc–air battery exhibits a high-power density of 168 mW cm−2 and a long cycle life of over 200 h. [ABSTRACT FROM AUTHOR]
- Published
- 2022
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