Regulated interfacial stability by coordinating ionic liquids with fluorinated solvent for high voltage and safety batteries

doi:10.1016/j.jpowsour.2021.229603

	Regulated interfacial stability by coordinating ionic liquids with fluorinated solvent for high voltage and safety batteries
	Yan, Shuxin 1; Wang, Yanlei 2; Chen, Tianhua 3; Gan, Zhongdong 4; Chen, Shimou 2,5,6; Liu, Yuwen 1; Zhang, Suojiang 2
刊名	JOURNAL OF POWER SOURCES
	2021-04-15
卷号	491 页码:10
关键词	Lithium ion batteries Interface Ionic liquids Fluorinated solvent High-voltage electrolyte Non-flammable electrolyte
ISSN号	0378-7753
DOI	10.1016/j.jpowsour.2021.229603
英文摘要	Electrolyte is the key to improve the safety, cycle performance and temperature adaptation of lithium batteries. In this paper, we introduce a novel electrolyte that based on ionic liquids (ILs) 1-butyl-1-methylpyrrolidinium bis (trifluoromethylsulfonyl)imide (PYR14-TFSI) and fluorinated solvent 1,1,1,3,3,3-hexafluoroisopropyl methyl ether (HFPM). HFPM can significantly reduce the viscosity of PYR14-TFSI and enhance the wettability with Celgard separators. In addition, the coordination of PYR14-TFSI and HFPM promotes the local dissolution of lithium nitrate and helps to form a stable cathode/anode interface film. The electrochemical test shows that the electrochemical window of the electrolyte can reach to 5.35 V. For the Li/LiNi0.6Co0.2Mn0.2O2 half cells, the capacity retention is 94% and the Coulomb efficiency is 99.9% after 100 cycles at 0.5 C. The uniform and dense interface film is characterized and confirmed by scanning electron microscopy and X-ray photoelectron spectroscopy, etc. Furthermore, the half-cell also exhibits good thermal stability at high temperature. Considering ILs and fluoroether are non-flammable solvent, this work may pave the way for designing future generation highperformance electrolyte for lithium batteries.
资助项目	National Natural Science Foundation of China[51922099] ; Chinese Academy of Sciences[CXYJJ20MS05] ; Natural Science Foundation of Hebei Province for Distinguished Young Scholars[E2020103052] ; Hebei Province Natural Science Foundation of China[E2019203469] ; Innovation Academy for Lightduty Gas Turbine
WOS研究方向	Chemistry ; Electrochemistry ; Energy & Fuels ; Materials Science
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000626628800001
资助机构	National Natural Science Foundation of China ; Chinese Academy of Sciences ; Natural Science Foundation of Hebei Province for Distinguished Young Scholars ; Hebei Province Natural Science Foundation of China ; Innovation Academy for Lightduty Gas Turbine
内容类型	期刊论文
源URL	[http://ir.ipe.ac.cn/handle/122111/47954]
专题	中国科学院过程工程研究所
通讯作者	Chen, Shimou; Liu, Yuwen
作者单位	1.Yanshan Univ, Coll Environm & Chem Engn, Hebei Key Lab Appl Chem, Qinhuangdao 066004, Hebei, Peoples R China 2.Chinese Acad Sci, Inst Proc Engn, CAS Key Lab Green Proc & Engn, Beijing Key Lab Ion Liquids Clean Proc, Beijing 100190, Peoples R China 3.Univ Adelaide, Sch Chem Engn & Adv Mat, Adelaide, SA 5005, Australia 4.Tianjin Univ, Sch Chem Engn & Technol, Tianjin 300072, Peoples R China 5.Beijing Univ Chem Technol, State Key Lab Chem Resource Engn, Beijing 100029, Peoples R China 6.Zhongke Langfang Inst Proc Engn, Langfang 065001, Hebei, Peoples R China
推荐引用方式 GB/T 7714	Yan, Shuxin,Wang, Yanlei,Chen, Tianhua,et al. Regulated interfacial stability by coordinating ionic liquids with fluorinated solvent for high voltage and safety batteries[J]. JOURNAL OF POWER SOURCES,2021,491:10.
APA	Yan, Shuxin.,Wang, Yanlei.,Chen, Tianhua.,Gan, Zhongdong.,Chen, Shimou.,...&Zhang, Suojiang.(2021).Regulated interfacial stability by coordinating ionic liquids with fluorinated solvent for high voltage and safety batteries.JOURNAL OF POWER SOURCES,491,10.
MLA	Yan, Shuxin,et al."Regulated interfacial stability by coordinating ionic liquids with fluorinated solvent for high voltage and safety batteries".JOURNAL OF POWER SOURCES 491(2021):10.