Carboxylic bacterial cellulose fiber-based hydrogel electrolyte with imidazole-type ionic liquid for dendrite-free zinc metal batteries
作者机构：School of Mechanical and Electronical EngineeringLanzhou University of TechnologyLanzhou730050PR China State Key Laboratory of Advanced Processing and Recycling of Non-ferrous MetalsSchool of Materials Science and EngineeringLanzhou University of TechnologyLanzhou730500PR China National Water and Energy CenterUnited Arab Emirates UniversityAl Ain15551United Arab Emirates
出 版 物：《Materials Reports(Energy)》 (材料导报（能源）（英文）)
年 卷 期：2024年第4卷第2期
页 面：45-53页
核心收录：
学科分类：0820[工学-石油与天然气工程] 081704[工学-应用化学] 07[理学] 08[工学] 0817[工学-化学工程与技术] 0805[工学-材料科学与工程（可授工学、理学学位）] 070303[理学-有机化学] 0703[理学-化学]
基 金：National Natural Science Foundation of China(51903113,51763014,and 52073133) China Postdoctoral Science Foundation(2022T150282,2019M663858) Program for Hongliu Excellent and Distinguished Young Scholars at Lanzhou University of Technology
主 题：Bacterial cellulose fiber Ionic liquids Carboxylic group Gel electrolyte Zn metal batteries
摘 要：Aqueous zinc metal batteries are regarded as the most promising energy storage system due to their advantages of high safety,low cost,and high theoretical ***,the growth of dendrites and the occurrence of side reactions hinder the development of zinc metal *** previous attempts to design advanced hydrogel electrolytes,achieving high mechanical performance and ionic conductivity of hydrogel electrolytes has remained *** this work,a hydrogel electrolyte with an ionic crosslinked network is prepared by carboxylic bacterial cellulose fiber and imidazole-type ionic liquid,following by a covalent network of *** hydrogel electrolyte possesses a superior ionic conductivity of 43.76 mS cm^(−1),leading to a Zn^(2+)migration number of 0.45,and high mechanical performance with an elastic modulus of 3.48 GPa and an elongation at breaking of 38.36%.More importantly,under the anion-coordination effect of the carboxyl group in bacterial cellulose and[BF4]−in imidazole-type ionic liquid,the solvation sheath of hydrated Zn^(2+)ions and the nucleation overpotential of Zn plating are *** results of cycled testing show that the growth of zinc dendrites is effectively inhibited and the generation of irreversible by-products is *** the carboxylic bacterial cellulose-based hydrogel electrolyte,the Zn||Zn symmetric batteries offer good cyclability as well as Zn||Ti batteries.
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