电解质
溶剂化
化学
齿合度
无机化学
水溶液
锌
阳极
溶剂
金属
金属有机骨架
电化学
容量损失
化学工程
吸附
有机化学
物理化学
电极
工程类
作者
Sheng Wang,Zhuo Chen,Jingjing Dong,Zhongchao Bai,Nana Wang,Shi Xue Dou,Jian Yang
标识
DOI:10.1002/anie.202414117
摘要
Rechargeable aqueous Zn metal batteries (AZMBs) are attractive for stationary energy storage due to their low cost and high safety. However, their practical application is hindered by the excessive use of zinc anodes and poor high‐temperature performance, caused by severe side reactions and dendritic growth issues. Here, an electrolyte design strategy is reported based on bidentate coordination of Zn2+ and solvent to tailor the solvation structure. The triethylene glycol (TEG) co‐solvent with two‐oxygen coordination sites is demonstrated to facilitate the formation of an anions‐involved solvation shell, greatly reducing the activity of coordinated H2O molecules. The sequential reduction of OTF‐ anions and TEG to form an organic‐inorganic bilayer SEI (hydrophobic organic layer and high ion conductivity inorganic layer), protecting Zn anodes from side reaction and dendrite growth, thus ensuring an unprecedented Zn reversibility (99.95% over 5000 cycles at 0.5 mA cm‐2). More importantly, the full cells of Zn||V2O5 exhibit a record‐high cumulative capacity (2552 mAh cm‐2) under a lean electrolyte condition (E/C ratio = 15 μL mAh‐1), a limited Zn supply (N/P ratio = 1.9) and a high areal capacity (3.0 mAh cm‐2).
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