Mixed salts of lithium difluoro (oxalate) borate and lithium tetrafluorobotate electrolyte on low-temperature performance for lithium-ion batteries

doi:10.1149/2.0851709jes

CORC > 兰州理工大学 > 兰州理工大学 > 石油化工学院

	Mixed salts of lithium difluoro (oxalate) borate and lithium tetrafluorobotate electrolyte on low-temperature performance for lithium-ion batteries
	Zhao, Qiuping; Zhang, Yu; Tang, Fengjuan; Zhao, Jiachen; Li, Shiyou
刊名	Journal of the Electrochemical Society
	2017
卷号	164 期号:9 页码:A1873-A1880
关键词	Electric discharges Electrolytes Ethylene Ions Lithium compounds Low temperature properties Oxalic acid Salts Temperature Action mechanisms Capacity retention Diethyl carbonates Discharge capacities Electrochemical behaviors Electrolyte systems Ethylene carbonate Low temperature performance
ISSN号	00134651
DOI	10.1149/2.0851709jes
英文摘要	The finding of appropriate electrolytes and applying them to low-temperature lithium-ion batteries is of special interest. Lithium difluoro (oxalate) borate (LiODFB) and lithium tetrafluorobotate (LiBF4) are promising salts for lithium-ion batteries owing to their unique characteristics. In this work, the electrochemical behaviors of blend salts of LiODFB and LiBF4 with different mole ratio were studied by employment of ethylene carbonate (EC), diethyl carbonate (DEC) and dimethyl sulfite (DMS) as mixed solvents in order to optimize the low-temperature performance for lithium-ion batteries. The results show that the electrolyte system of LiODFB/LiBF4 (1:1, by molar)-EC/DEC/DMS (1:2:1, by volume) is the optimized electrolyte, and the discharge capacity of the electrodes in the optimized electrolyte is 82.5 mAh g-1 at -40°C, maintaining 55.7% of the room temperature capacity and nearly 100% of capacity retention for 50 cycles. The electrolyte exhibits not only excellent film-forming characteristics, but also low impedance of the interface film at low temperature. Especially, the action mechanism of LiODFB, LiBF4 as well as functional solvent on optimization of low-temperature performance is discussed. © 2017 The Electrochemical Society.
WOS研究方向	Electrochemistry ; Materials Science
语种	英语
出版者	Electrochemical Society Inc.
WOS记录号	WOS:000413256400180
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/114038]
专题	石油化工学院
作者单位	College of Petrochemical Technology, Lanzhou University of Technology, Lanzhou; 730050, China
推荐引用方式 GB/T 7714	Zhao, Qiuping,Zhang, Yu,Tang, Fengjuan,et al. Mixed salts of lithium difluoro (oxalate) borate and lithium tetrafluorobotate electrolyte on low-temperature performance for lithium-ion batteries[J]. Journal of the Electrochemical Society,2017,164(9):A1873-A1880.
APA	Zhao, Qiuping,Zhang, Yu,Tang, Fengjuan,Zhao, Jiachen,&Li, Shiyou.(2017).Mixed salts of lithium difluoro (oxalate) borate and lithium tetrafluorobotate electrolyte on low-temperature performance for lithium-ion batteries.Journal of the Electrochemical Society,164(9),A1873-A1880.
MLA	Zhao, Qiuping,et al."Mixed salts of lithium difluoro (oxalate) borate and lithium tetrafluorobotate electrolyte on low-temperature performance for lithium-ion batteries".Journal of the Electrochemical Society 164.9(2017):A1873-A1880.