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

文献类型：期刊论文

作者Yan, Shuxin1; Wang, Yanlei2; Chen, Tianhua3; Gan, Zhongdong4; Chen, Shimou2,5,6; Liu, Yuwen1; Zhang, Suojiang2
刊名JOURNAL OF POWER SOURCES
出版日期2021-04-15
卷号491页码:10
ISSN号0378-7753
关键词Lithium ion batteries Interface Ionic liquids Fluorinated solvent High-voltage electrolyte Non-flammable electrolyte
DOI10.1016/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
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.

入库方式： OAI收割

来源：过程工程研究所

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