Ionic liquid-integrated aqueous electrolyte regulation on solvation chemistry and electrode interface for reversible dendrite-free zinc anodes.

Autor: Guo HJ; Key Laboratory of Green Chemical Process of Ministry of Education, Hubei Key Laboratory of Novel Chemical Reactor and Green Chemical Technology, School of Chemical Engineering & Pharmacy, Wuhan Institute of Technology, 430073 Wuhan, China., Chen XJ; School of Energy and Power Engineering, North University of China, Taiyuan 030051, Shanxi, China., Shu R; Key Laboratory of Green Chemical Process of Ministry of Education, Hubei Key Laboratory of Novel Chemical Reactor and Green Chemical Technology, School of Chemical Engineering & Pharmacy, Wuhan Institute of Technology, 430073 Wuhan, China., Zhong XB; School of Energy and Power Engineering, North University of China, Taiyuan 030051, Shanxi, China. Electronic address: ZhongXB@nuc.edu.cn., Zhang LX; Shanxi Provincial Key Laboratory for High Performance Battery Materials and Devices, Taiyuan 030051, Shanxi, China., Song YX; School of Energy and Power Engineering, North University of China, Taiyuan 030051, Shanxi, China. Electronic address: songyuexian@nuc.edu.cn.
Jazyk: angličtina
Zdroj: Journal of colloid and interface science [J Colloid Interface Sci] 2025 Jan 15; Vol. 678 (Pt A), pp. 627-636. Date of Electronic Publication: 2024 Aug 30.
DOI: 10.1016/j.jcis.2024.08.179
Abstrakt: Zn anodes suffer from poor reversibility and stability owing to nonuniform dendrite growth and self-corrosion. Here, 1-ethyl-3-methylimidazolium acetate (EMImAc) is introduced to reconstruct interfacial electrical double layer with simultaneously manipulating the solvation environment and the adsorption situation on Zn anode. The acetate anions with high nucleophilicity can effectively alter the solvation shell around Zn 2+ ions and immobilize the H 2 O molecules, thus weakening water activity and alleviating water-related parasitic reactions. Concomitantly, both the imidazolium cation and acetate anion are inclined to gather on Zn anode surface for constructing an electrostatic shielding layer, and meanwhile the chemisorbed acetate anions also contribute to accelerate the Zn(H 2 O) 6 2+ desolvation process. Such a synergistic effect enables uniform electric field distribution and facilitates Zn ion flux, which mitigates the random diffusion of Zn 2+ and finally promotes the dendrite-free deposition. As a result, the Zn/Zn symmetric cells with EMImAc-integrated aqueous electrolyte realize an excellent cycling lifespan of 7000 h (0.5 mA cm -2 /0.25 mAh cm -2 ) and high Zn utilization of 61.3 % (15 mA cm -2 /20 mAh cm -2 ). Furthermore, the effective of EMImAc additive is demonstrated in Zn/V 2 O 5 cells. This work offers insights into the ionic liquid-integrated aqueous electrolytes to enhance the interface stability of Zn anode for rechargeable zinc batteries.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2024 Elsevier Inc. All rights reserved.)
Databáze: MEDLINE
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