Solvation Barrier Remodeling-Dictated Fast-Kinetics Top-Down Zn Stripping/Plating in Water-Lean Organic Electrolytes

被引：6
作者：
Feng, Zhenfeng [1 ]
Tang, Yongchao [1 ,2 ]
Wei, Yue [3 ]
Liu, Guigui [1 ]
Li, Hongqing [1 ]
Yan, Jianping [1 ]
Qi, Jintu [1 ]
Liu, Xiaoqing [1 ,2 ]
Wen, Zhipeng [1 ,2 ]
Ye, Minghui [1 ,2 ]
Zhang, Yufei [1 ,2 ]
Li, Cheng Chao [1 ,2 ]
机构：
[1] Guangdong Univ Technol, Sch Chem Engn & Light Ind, Guangzhou 510006, Peoples R China
[2] Jieyang Ctr, Guangdong Prov Lab Chem & Fine Chem Engn, Jieyang 515200, Peoples R China
[3] Dongguan Univ Technol, Sch Environm & Civil Engn, Dongguan 523808, Guangdong, Peoples R China
来源：
ADVANCED ENERGY MATERIALS | 2024年 / 14卷 / 35期
基金：
中国国家自然科学基金;
关键词：
kinetics; solvation barrier remodeling; & quot; top-down & quot; Zn stripping/plating; water-lean organic electrolytes; Zn batteries; ENERGY; BATTERIES;
D O I：
10.1002/aenm.202401706
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Different from "bottom-up" Zn plating/stripping, "top-down" Zn stripping/plating provides a new perspective to reinvent current aqueous Zn batteries (AZBs), yet related studies remain absent. Herein, a chelation-induced solvation barrier remodeling strategy is initiated toward fast-kinetics "top-down" Zn stripping/plating in original Zn2+-free water-lean organic electrolytes (WLOE) for durable Zn batteries. It is found that in WLOE, the initial Zn stripping kinetics of the Zn anode remarkably limits the "top-down" Zn stripping/plating. The intervention of multidentate chelant (2-methoxyethylamine, MEA) in WLOE greatly lowers the solvation reorganization energy of in situ stripped Zn2+ from the Zn anode, enabling the fast-kinetics "top-down" Zn stripping/plating. Spectral characterization and fitted overpotential-reorganization energy correlation strongly confirm the underlying mechanism. As such, the Zn stripping/plating in the MEA-mediated WLOE shows a 90-fold-enhanced current response, triple-lowered overpotential, and 170-fold-prolonged cyclability (over 1700 h at 0.5 mA cm(-2)) of those in MEA-free counterpart. The assembled Zn||LiFePO4 hybrid full cell in MEA-regulated WLOE exhibits a distinct and high voltage plateau of 1.50 V and a low polarization voltage of 0.14 V, far surpassing those in conventional WLOE. This work opens a new avenue to break the kinetics bottleneck of Zn stripping/plating in WLOE for durable Zn batteries.
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页数：9
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