Recovering the electrochemical window by forming a localized solvation nanostructure in ionic liquids with trace water

作     者：Jianing Meng Meng Ye Yue Wang Yinglun Sun Xu Zhang Kaiyuan Shi Xingbin Yan Jianing Meng;Meng Ye;Yue Wang;Yinglun Sun;Xu Zhang;Kaiyuan Shi;Xingbin Yan

作者机构：School of Materials Science and EngineeringSun Yat-Sen UniversityGuangzhou 510275China Laboratory of Clean Energy Chemistry and MaterialsLanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhou 730000China School of Petrochemical EngineeringLanzhou University of TechnologyLanzhou 730050China School of Physical Science and TechnologyLanzhou UniversityLanzhou 730000China 

出 版 物：《Science China Chemistry》 (中国科学（化学英文版）)

年 卷 期：2022年第65卷第1期

页      面：96-105页

核心收录：

学科分类：080801[工学-电机与电器] 081704[工学-应用化学] 0808[工学-电气工程] 07[理学] 070205[理学-凝聚态物理] 08[工学] 070304[理学-物理化学(含∶化学物理)] 0817[工学-化学工程与技术] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 0702[理学-物理学] 

基　　金：supported by the Zhaoqing Municipal Science and Technology Bureau(2019K038) the Research Start-up Funds from Sun Yat-sen University 

主　　题：supercapacitor ionic liquid electrochemical window lithium salt trace water 

摘      要：Motivated by the fascinating merits of wide electrochemical stability window(ESW)and nonflammability,ionic liquids(ILs)have been utilized as advanced electrolytes in various emerging electrochemical energy storage ***,ILs are hygroscopic to the water in the air and the presence of trace water will narrow the ESW of *** this article,we report that a localized solvation nanostructure(LSNS)is formed in ILs,which plays an important role in fully recovering the originally decreased ESW of[EMIM][TFSI]IL owing to the trace *** LSNS is consisted of Li^(+)ions with water molecules as the center,TFSI-anions as the secondary periphery and EMIM^(+)cations as the outermost layer after adding the proper amount of *** nanostructure can restrain the possibility of trace water to approach the electrode/electrolyte interfaces and adverse redox reactions,thereby recovering the ***,the effectiveness of this strategy in different kinds of ILs to fully recover ESW decreasing is *** article comes up with a feasible method to eliminate the trace water caused ESW drop for ILbased electrolytes and provides a new insight for understanding the molecular-level interaction between different ions in ILs with water molecules.