Fluorosilane compounds with oligo(ethylene oxide) substituent as safe electrolyte solvents for high-voltage lithium-ion batteries

doi:10.1016/j.jpowsour.2016.10.009

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	Fluorosilane compounds with oligo(ethylene oxide) substituent as safe electrolyte solvents for high-voltage lithium-ion batteries
	Wang, Jinglun; Mai, Yongjin; Luo, Hao; Yan, Xiaodan; Zhang, Lingzhi
刊名	JOURNAL OF POWER SOURCES
	2016-12-01
卷号	334 页码:58-64
关键词	Electrolyte Fluorosilane High Voltage Thermal Stability Lithium-ion Batteries
DOI	10.1016/j.jpowsour.2016.10.009
文献子类	Article
英文摘要	Two fluorosilanes with oligo(ethylene oxide) unites were synthesized through hydrosilylation of chlorosilane with allyl substituted oligo(ethylene oxide) ether followed by fluorination with potassium fluoride. The synthesized fluorosilane compounds exhibited lower viscosity, higher dielectric constant and higher oxidation potential, compared with their non-fluorination counterparts. Difluoro(3-(2-(2-methoxyethoxy)ethoxy)propyl)methylsilane (DFSM2), one of the two compounds, was evaluated as high-voltage and thermal stable electrolyte co-solvent with the conventional carbonate-based electrolytes. Using an optimized electrolyte of 1M LiPF6 in EC/DFSM2/EMC (2/3/5 in vol.) with addition of 5 wt% fluoroethylene carbonate (FEC), high-voltage LiCoO2(LCO)/graphite full cell displayed outstanding cycling stability of 92.5% capacity retention after 135 cycles at 4.4 V upper cutoff voltage. Characterized by differential scanning calorimetry (DSC) analysis, the DFSM2-based electrolyte demonstrated higher thermal stability with lithiated graphite anode and delithiated LCO cathode, thus better safety feature compared with the conventional electrolyte. (C) 2016 Elsevier B.V. All rights reserved.
WOS关键词	FLUORINATED ELECTROLYTES ; ELECTROCHEMICAL PROPERTIES ; FLUOROETHYLENE CARBONATE ; POLYMER ELECTROLYTES ; CATHODE MATERIALS ; RECENT PROGRESS ; PERFORMANCE ; STABILITY ; LICOO2 ; METHYLPHOSPHONATE
语种	英语
WOS记录号	WOS:000387526100008
资助机构	K. C. Wong Education Foundation, Guangdong Provincial Project for Science Technology(2014A050503050/2015B010135008) ; Guangzhou Municipal Project for Science Technology(2014Y2-00012/201509010018) ; National Natural Science Foundation of China(21573239)
内容类型	期刊论文
源URL	[http://ir.giec.ac.cn/handle/344007/13974]
专题	中国科学院广州能源研究所
作者单位	Chinese Acad Sci, Guangzhou Inst Energy Convers, Guangdong Key Lab New & Renewable Energy Res & De, Guangzhou 510640, Guangdong, Peoples R China
推荐引用方式 GB/T 7714	Wang, Jinglun,Mai, Yongjin,Luo, Hao,et al. Fluorosilane compounds with oligo(ethylene oxide) substituent as safe electrolyte solvents for high-voltage lithium-ion batteries[J]. JOURNAL OF POWER SOURCES,2016,334:58-64.
APA	Wang, Jinglun,Mai, Yongjin,Luo, Hao,Yan, Xiaodan,&Zhang, Lingzhi.(2016).Fluorosilane compounds with oligo(ethylene oxide) substituent as safe electrolyte solvents for high-voltage lithium-ion batteries.JOURNAL OF POWER SOURCES,334,58-64.
MLA	Wang, Jinglun,et al."Fluorosilane compounds with oligo(ethylene oxide) substituent as safe electrolyte solvents for high-voltage lithium-ion batteries".JOURNAL OF POWER SOURCES 334(2016):58-64.