Insight on Organic Molecules in Aqueous Zn‐Ion Batteries with an Emphasis on the Zn Anode Regulation

Rechargeable aqueous zinc ion batteries (AZIBs), as a rising star in aqueous ion batteries, are restricted by the narrow voltage window and the unsatisfactory reversibility, which are dominated by the high activity of H2O molecules, side reaction, Zn dendrites, and structural degeneration of the cat...

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Bibliographic Details
Published in:Advanced energy materials 2022-03, Vol.12 (9), p.n/a
Main Authors: Wang, Donghong, Li, Qing, Zhao, Yuwei, Hong, Hu, Li, Hongfei, Huang, Zhaodong, Liang, Guojin, Yang, Qi, Zhi, Chunyi
Format: Article
Language:English
Subjects:
Anode effect
Degeneration
Electrolytes
Organic chemistry
organic molecules
Rechargeable batteries
solid electrolyte interface
solvation sheath
temperature adaptability
Water chemistry
Zinc
Zn dendrites
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Summary:Rechargeable aqueous zinc ion batteries (AZIBs), as a rising star in aqueous ion batteries, are restricted by the narrow voltage window and the unsatisfactory reversibility, which are dominated by the high activity of H2O molecules, side reaction, Zn dendrites, and structural degeneration of the cathode. Electrolyte manipulation has seen a great deal of research recently, particularly various kinds of organic molecules have been shown to achieve outstanding effects on stabilizing the Zn anode, yet the exploration of the mechanism behind the high performance has not been thorough. In an attempt to find such underlying principles, the basic reactions and the corresponding progress on the anode side of AZIBs are first assessed. Then, the roles of organic molecules in recent studies are researched, followed by a deep insight into the role of organic molecules. Finally, several designed strategies are proposed for the further exploration of high performance aqueous rechargeable ZIBs through incorporating appropriate organic molecules in the electrolytes. Organic molecules as electrolyte regulators, influence the efficiency of Zn electrodes by tuning the interplay among the Zn surface, Zn ions, water molecules, and anions, including manipulating Zn2+‐solvation structure, constructing Zn2+‐organic molecule coordination, decreasing the Zn2+‐water coordination, and impairing the electrostatic coupling between the cations and anions.
ISSN:1614-6832
1614-6840
DOI:10.1002/aenm.202102707