NDLI: Ionic liquid-based electrolyte with dual-functional LiDFOB additive toward high-performance LiMn$_{2}$O$

Content Provider	Springer Nature Link
Author	Qin, Bingsheng Zhang, Shu Hu, Zhenglin Liu, Zhihong Zhang, Junnan Zhao, Jianghui Xiong, Junwei Cui, Guanglei
Copyright Year	2017
Abstract	Manganese oxide-based cathodes are one of the most promising lithium-ion battery (LIB) cathode materials due to their cost-effectiveness, high discharge voltage plateau (above 4.0 V vs. Li/Li$^{+}$), superior rate capability, and environmental benignity. However, these batteries using conventional LiPF$_{6}$-based electrolytes suffer from Mn dissolution and poor cyclic capability at elevated temperature. In this paper, the ionic liquid (IL)-based electrolytes, consisting of 1-butyl-1-methylpyrrolidinium bis(trifluoromethanesulfon)imidate (PYR$_{1,4}$-TFSI), propylene carbonate (PC), lithium bis(trifluoromethanesulfon)imide (LiTFSI), and lithium oxalyldifluoroborate (LiDFOB) additive, were explored for improving the high temperature performance of the LiMn$_{2}$O$_{4}$ batteries. It was demonstrated that LiTFSI-ILs/PC electrolyte associated with LiDFOB addition possessed less Mn dissolution and Al corrosion at the elevated temperature in LiMn$_{2}$O$_{4}$/Li batteries. Cyclic voltammetry and electrochemical impedance spectroscopy implied that this kind of electrolyte also contributed to the formation of a highly stable solid electrolyte interface (SEI), which was in accordance with the polarization measurement and the Li deposition morphology of the symmetric lithium metal cell, thus beneficial for improving the cycling performance of the LiMn$_{2}$O$_{4}$ batteries at the elevated temperature. Cyclic voltammetry and electrochemical impedance spectroscopy implied that the cells using this kind of electrolyte exhibited better interfacial stability, which was further verified by the polarization measurement and the Li deposition morphology of the symmetric lithium metal cell, thus beneficial for improving the cycling performance of the LiMn$_{2}$O$_{4}$ batteries at the elevated temperature. These unique characteristics would endow this kind of electrolyte a very promising candidate for the manganese oxide-based batteries.
Starting Page	1399
Ending Page	1406
Page Count	8
File Format	PDF
ISSN	09477047
Journal	Ionics
Volume Number	23
Issue Number	6
e-ISSN	18620760
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2017-01-07
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Ionic liquid-based electrolyte LiMn$_{2}$O$_{4}$ batteries Dual-functional additive Solid electrolyte interface Electrochemistry Renewable and Green Energy Optical and Electronic Materials Condensed Matter Physics Energy Storage
Content Type	Text
Resource Type	Article
Subject	Physics and Astronomy Engineering Materials Science Chemical Engineering

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