电解质
材料科学
溶剂化
水溶液
法拉第效率
无机化学
锌
分子
电化学
化学工程
环境友好型
化学
有机化学
物理化学
冶金
电极
工程类
生态学
生物
作者
Chaohua Sun,Rui Kai Miao,Jipeng Li,Yanzhi Sun,Yong Mei Chen,Junqing Pan,Yang Tang,Pingyu Wan
标识
DOI:10.1021/acsami.3c00521
摘要
Aqueous zinc-ion batteries are considered as an ideal substitute for lithium-ion batteries due to their abundant resource storage, high safety, and low price. However, zinc anodes exhibit poor reversibility and cyclic stability in most conventional aqueous electrolytes. Herein, an environmentally friendly Zn(CH3SO3)2 electrolyte is proposed to solve the problems of common aqueous electrolytes. The bulky CH3SO3– anions can regulate the solvation structure of Zn2+ by replacing some water molecules in the primary solvation sheath of Zn2+, thus slowing the hydrogen evolution side reactions and formation of zinc dendrite. Additionally, the changing solvation structure weakens the bonding between Zn2+ and the surrounding water molecules, which is conducive to the transport and charge transfer of Zn2+, thus improving the battery capacity. In the Zn(CH3SO3)2 electrolyte, Zn plating/stripping exhibits a high Coulombic efficiency of >98% and long-term cyclic stability over 800 h. The specific capacity of the assembled Zn//V2O5 cell in 3 mol L–1 Zn(CH3SO3)2 reaches 350 mA h g–1 at 0.1 A g–1, much higher than that in the ZnSO4 electrolyte (213 mA h g–1). In conclusion, this work offers insights into the exploration of advanced green electrolyte systems for zinc-ion batteries.
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