Electric Double Layer Regulator Design through a Functional Group Assembly Strategy towards Long‐Lasting Zinc Metal Batteries

Regulating the electric double layer (EDL) structure of the zinc metal anode by using electrolyte additives is an efficient way to suppress interface side reactions and facilitate uniform zinc deposition. Nevertheless, there are no reports investigating the proactive design of EDL‐regulating additiv...

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Bibliographic Details
Published in:Angewandte Chemie 2024-07, Vol.136 (30), p.n/a
Main Authors: Liu, Liyang, Wang, Xinyi, Hu, Zewei, Wang, Xin, Zheng, Qingqing, Han, Chao, Xu, Jiantie, Xu, Xun, Liu, Hua‐Kun, Dou, Shi‐Xue, Li, Weijie
Format: Article
Language:English
Subjects:
Additives
Adsorption
aqueous zinc batteries
Assembling
Assembly
Binding sites
Deposition
Design
Electric double layer
electric double layer regulation
electrolyte additive
Electrolytes
functional group assembly strategy
Functional groups
Imidazole
Ions
Metals
Side reactions
Solvation
Sulfonamides
Zinc
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Summary:Regulating the electric double layer (EDL) structure of the zinc metal anode by using electrolyte additives is an efficient way to suppress interface side reactions and facilitate uniform zinc deposition. Nevertheless, there are no reports investigating the proactive design of EDL‐regulating additives before the start of experiments. Herein, a functional group assembly strategy is proposed to design electrolyte additives for modulating the EDL, thereby realizing a long‐lasting zinc metal anode. Specifically, by screening ten common functional groups, N, N‐dimethyl‐1H‐imidazole‐1‐sulfonamide (IS) is designed by assembling an imidazole group, characterized by its high adsorption capability on the zinc anode, and a sulfone group, which exhibits strong binding with Zn2+ ions. Benefiting from the adsorption functionalization of the imidazole group, the IS molecules occupy the position of H2O in the inner Helmholtz layer of the EDL, forming a molecular protective layer to inhibit H2O‐induced side reactions. Meanwhile, the sulfone group in IS, acting as a binding site to Zn2+, promotes the de‐solvation of Zn2+ ions, facilitating compact zinc deposition. Consequently, the utilization of IS significantly extending the cycling stability of Zn||Zn and Zn||NaV3O8 ⋅ 1.5H2O full cell. This study offers an innovative approach to the design of EDL regulators for high‐performance zinc metal batteries. An electric double layer regulator, N, N‐dimethyl‐1H‐imidazole‐1‐sulfonamide (IS), is rationally designed by a functional group assembly strategy. The high adsorption ability of the imidazole group in IS with zinc anode facilitates the formation of an IS molecular layer to suppress side reactions. Meanwhile, the high binding capability of sulfone group in IS with Zn2+ promotes the de‐solvation of Zn2+ to achieve uniform zinc deposition.
ISSN:0044-8249
1521-3757
DOI:10.1002/ange.202405209