路易斯酸
电解质
法拉第效率
阳极
化学
电子
无机化学
材料科学
催化作用
有机化学
物理化学
物理
电极
量子力学
作者
Lijun Zhou,Fuxin Wang,Fan Yang,Xiaoqing Liu,Yuxia Yu,Dezhou Zheng,Xihong Lu
标识
DOI:10.1002/anie.202208051
摘要
Abstract The hydrogen evolution and dendrite issues are the notorious culprits of the limited lifespan and Coulombic efficiency (CE) of Zn anodes, particularly at harsh test conditions. Herein, considering the Lewis acidic feature of Zn 2+ , abundant unshared pair electrons of zincophilic Lewis bases are proposed as decent electrolyte additives to stabilize Zn anodes at “Three High” conditions (high depth of discharge, high areal capacity and high current). The unshared pair electrons can remove H 2 O from Zn 2+ solvated sheaths and confine the activity of H 2 O by breaking its hydrogen bonding network. The combination of these factors effectively restricts H 2 O‐involved side reactions and enables dendrite‐free Zn deposition, even at harsh conditions. The effectiveness of this strategy is fully proved by a series of Lewis base molecules. Noticeably, the Zn||Zn cell with an area of 20 cm 2 , using DMF‐containing electrolyte can be stably cycled over 1000 h at 60 % DOD, with a 100 % CE.
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