Affiliation:
1. School of Resource and Environmental Sciences Hubei Biomass‐Resource Chemistry and Environmental Biotechnology Key Laboratory Wuhan University Wuhan 430079 China
2. College of Chemical Engineering Nanjing Forestry University Jiangsu Provincial Key Lab for the Chemistry and Utilization of Agro–Forest Biomass Co–Innovation Center of Efficient Processing and Utilization of Forest Resources International Innovation Center for Forest Chemicals and Materials Nanjing 210037 China
Abstract
AbstractThe strong reactivity of water in aqueous electrolytes toward metallic zinc (Zn), especially at aggressive operating conditions, remains the fundamental obstacle to the commercialization of aqueous zinc metal batteries (AZMBs). Here, a water‐immiscible ionic liquid diluent 1‐ethyl‐3‐methylimidazolium bis(fluorosulfonyl)amide (EmimFSI) is reported that can substantially suppress the water activity of aqueous electrolyte by serving as a “water pocket”, enveloping the highly active H2O‐dominated Zn2+ solvates and protecting them from parasitic reactions. During Zn deposition, the cation Emim+ and anion FSI− function respectively in mitigating the tip effect and regulating the solid electrolyte interphase (SEI), thereby favoring a smooth Zn deposition layer protected by inorganic species‐enriched SEI featuring high uniformity and stability. Combined with the boosted chemical/electrochemical stability endowed by the intrinsic merits of ionic liquid, this ionic liquid‐incorporated aqueous electrolyte (IL‐AE) enables the stable operation of Zn||Zn0.25V2O5·nH2O cells even at a challenging temperature of 60 °C (>85% capacity retention over 400 cycles). Finally, as an incidental but practically valuable benefit, the near‐zero vapor pressure nature of ionic liquid allows the efficient separation and recovery of high‐value components from the spent electrolyte via a mild and green approach, promising the sustainable future of IL‐AE in realizing practical AZMBs.
Funder
Wuhan University
National Natural Science Foundation of China
China Postdoctoral Science Foundation
Subject
Mechanical Engineering,Mechanics of Materials,General Materials Science
Cited by
85 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献