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

doi:10.1007/s11426-021-1111-2

CORC > 兰州理工大学 > 兰州理工大学

	Recovering the electrochemical window by forming a localized solvation nanostructure in ionic liquids with trace water
	Meng, Jianing 1,2; Ye, Meng 3; Wang, Yue 4; Sun, Yinglun 2; Zhang, Xu 2; Shi, Kaiyuan 1; Yan, Xingbin 1,2
刊名	SCIENCE CHINA-CHEMISTRY
	2021-11
卷号	65 期号:1 页码:96-105
关键词	supercapacitor ionic liquid electrochemical window lithium salt trace water
ISSN号	1674-7291
DOI	10.1007/s11426-021-1111-2
英文摘要	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 technologies. However, ILs are hygroscopic to the water in the air and the presence of trace water will narrow the ESW of ILs. In 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 water. Such 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 LiTFSI. This nanostructure can restrain the possibility of trace water to approach the electrode/electrolyte interfaces and adverse redox reactions, thereby recovering the ESW. Moreover, the effectiveness of this strategy in different kinds of ILs to fully recover ESW decreasing is verified. This article comes up with a feasible method to eliminate the trace water caused ESW drop for IL-based electrolytes and provides a new insight for understanding the molecular-level interaction between different ions in ILs with water molecules.
WOS研究方向	Chemistry
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000720241300001
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/149986]
专题	兰州理工大学
作者单位	1.Sun Yat Sen Univ, Sch Mat Sci & Engn, Guangzhou 510275, Peoples R China; 2.Chinese Acad Sci, Lanzhou Inst Chem Phys, Lab Clean Energy Chem & Mat, Lanzhou 730000, Peoples R China; 3.Lanzhou Univ Technol, Sch Petrochem Engn, Lanzhou 730050, Peoples R China; 4.Lanzhou Univ, Sch Phys Sci & Technol, Lanzhou 730000, Peoples R China
推荐引用方式 GB/T 7714	Meng, Jianing,Ye, Meng,Wang, Yue,et al. Recovering the electrochemical window by forming a localized solvation nanostructure in ionic liquids with trace water[J]. SCIENCE CHINA-CHEMISTRY,2021,65(1):96-105.
APA	Meng, Jianing.,Ye, Meng.,Wang, Yue.,Sun, Yinglun.,Zhang, Xu.,...&Yan, Xingbin.(2021).Recovering the electrochemical window by forming a localized solvation nanostructure in ionic liquids with trace water.SCIENCE CHINA-CHEMISTRY,65(1),96-105.
MLA	Meng, Jianing,et al."Recovering the electrochemical window by forming a localized solvation nanostructure in ionic liquids with trace water".SCIENCE CHINA-CHEMISTRY 65.1(2021):96-105.