Volume 135, Issue 7 e202216934
Forschungsartikel

ZnF2-Riched Inorganic/Organic Hybrid SEI: in situ-Chemical Construction and Performance-Improving Mechanism for Aqueous Zinc-ion Batteries

Dan Xie

Dan Xie

Faculty of Chemistry, Northeast Normal University, Changchun, 130024 P. R. China

These authors contributed equally to this work.

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Yuan Sang

Yuan Sang

Faculty of Chemistry, Northeast Normal University, Changchun, 130024 P. R. China

These authors contributed equally to this work.

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Dan-Hong Wang

Dan-Hong Wang

Faculty of Chemistry, Northeast Normal University, Changchun, 130024 P. R. China

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Wan-Yue Diao

Wan-Yue Diao

Faculty of Chemistry, Northeast Normal University, Changchun, 130024 P. R. China

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Fang-Yu Tao

Fang-Yu Tao

Faculty of Chemistry, Northeast Normal University, Changchun, 130024 P. R. China

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Chang Liu

Chang Liu

Faculty of Chemistry, Northeast Normal University, Changchun, 130024 P. R. China

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Prof. Jia-Wei Wang

Corresponding Author

Prof. Jia-Wei Wang

School of Chemistry and Environmental Engineering, Changchun University of Science and Technology, Changchun, 130012 P. R. China

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Prof. Hai-Zhu Sun

Prof. Hai-Zhu Sun

Faculty of Chemistry, Northeast Normal University, Changchun, 130024 P. R. China

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Prof. Jing-Ping Zhang

Corresponding Author

Prof. Jing-Ping Zhang

Faculty of Chemistry, Northeast Normal University, Changchun, 130024 P. R. China

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Prof. Xing-Long Wu

Corresponding Author

Prof. Xing-Long Wu

Faculty of Chemistry, Northeast Normal University, Changchun, 130024 P. R. China

MOE Key Laboratory for UV Light-Emitting Materials and Technology, Northeast Normal University, Changchun, 130024 P. R. China

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First published: 07 December 2022

Abstract

Uncontrolled dendrites growth and serious parasitic reactions in aqueous electrolytes, greatly hinder the practical application of aqueous zinc-ion battery. On the basis of in situ-chemical construction and performance-improving mechanism, multifunctional fluoroethylene carbonate (FEC) is introduced into aqueous electrolyte to construct a high-quality and ZnF2-riched inorganic/organic hybrid SEI (ZHS) layer on Zn metal anode (ZMA) surface. Notably, FEC additive can regulate the solvated structure of Zn2+ to reduce H2O molecules reactivity. Additionally, the ZHS layer with strong Zn2+ affinity can avoid dendrites formation and hinder the direct contact between the electrolyte and anode. Therefore, the dendrites growth, Zn corrosion, and H2 evolution reaction on ZMA in FEC-included ZnSO4 electrolyte are highly suppressed. Thus, ZMA in such electrolyte realize a long cycle life over 1000 h and deliver a stable coulombic efficiency of 99.1 % after 500 cycles.

Conflict of interest

There are no conflicts to declare.

Data Availability Statement

The data that support the findings of this study are available from the corresponding author upon reasonable request.

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