Influences of trace water on electrochemical performances for lithium hexafluoro phosphate- and lithium Bis (oxalato) borate-based electrolytes

doi:10.1016/j.electacta.2018.03.138

CORC > 兰州理工大学 > 兰州理工大学 > 石油化工学院

	Influences of trace water on electrochemical performances for lithium hexafluoro phosphate- and lithium Bis (oxalato) borate-based electrolytes
	Cui, Xiaoling 1,2,3; Tang, Fengjuan ; Zhang, Yu 3; Li, Chunlei 3; Zhao, Dongni 3; Zhou, Fangzhi 3; Li, Shiyou 1,2,3,4; Feng, Huixia 1,2,3
刊名	ELECTROCHIMICA ACTA
	2018-05-20
卷号	273 页码:191-199
关键词	Lithium ion batteries Lithium bis(oxalato) borate Water concentration Solid electrolyte interphase layer Electrolyte
ISSN号	0013-4686
DOI	10.1016/j.electacta.2018.03.138
英文摘要	Water has a fatal influence on the performance of lithium ion batteries. In this work, Lithium hexafluoro phosphate(LiPF6)-ethylene carbonate (EC)/diethyl carbonate (DEC) and lithium bis(oxalato) borate (LiBOB)-tetramethylene sulfone (SL)/DEC are taken as examples to investigate the influences of water concentration for electrochemical window, acidity, impedance and cycling performance for lithium ion batteries by adjusting water concentrations in the electrolytes. Results show that LiBOB-based electrolyte has better water tolerance compared with LiPF6-based system, due to the formation of LiBOB. xH(2)O compounds by consuming the additive trace water. Besides, inductively coupled plasma test result shows that Mn ion dissolution in LiPF6 systems is extremely severe, which is mainly caused by the corrosive reaction between LiMn2O4 and by-product HF acid. And we believe that Mn ion dissolution and the following deposition should be responsible for failure work of LiPF6-based cells. But for LiBOB-based cells, stable SEI layers and good electrochemical performances have been obtained, benefitting from the synergistic effect between LiBOB salt and SL solvent. And the presence of high-resistance B(C2O4) (OH) and LiB(C2O4) (OH)(2) products on surface of graphite electrode is the main reason for a small number of capacity fading. (C) 2018 Elsevier Ltd. All rights reserved.
资助项目	Natural Science Foundation of China[21406100][21766017] ; Science and Technology Planning Project of Gansu Province[1606RJYA298]
WOS研究方向	Electrochemistry
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000431776600022
状态	已发表
内容类型	期刊论文
源URL	[http://119.78.100.223/handle/2XXMBERH/32641]
专题	石油化工学院材料科学与工程学院省部共建有色金属先进加工与再利用国家重点实验室教务处（创新创业学院）
通讯作者	Feng, Huixia
作者单位	1.Lanzhou Univ Technol, State Key Lab Adv Proc & Recycling Nonferrous Met, Lanzhou 730050, Gansu, Peoples R China 2.Lanzhou Univ Technol, Sch Mat Sci & Engn, Lanzhou 730050, Gansu, Peoples R China 3.Lanzhou Univ Technol, Coll Petrochem Technol, Lanzhou 730050, Gansu, Peoples R China 4.Gansu Engn Lab Electrolyte Mat Lithium Ion Batter, Lanzhou 730050, Gansu, Peoples R China
推荐引用方式 GB/T 7714	Cui, Xiaoling,Tang, Fengjuan,Zhang, Yu,et al. Influences of trace water on electrochemical performances for lithium hexafluoro phosphate- and lithium Bis (oxalato) borate-based electrolytes[J]. ELECTROCHIMICA ACTA,2018,273:191-199.
APA	Cui, Xiaoling.,Tang, Fengjuan.,Zhang, Yu.,Li, Chunlei.,Zhao, Dongni.,...&Feng, Huixia.(2018).Influences of trace water on electrochemical performances for lithium hexafluoro phosphate- and lithium Bis (oxalato) borate-based electrolytes.ELECTROCHIMICA ACTA,273,191-199.
MLA	Cui, Xiaoling,et al."Influences of trace water on electrochemical performances for lithium hexafluoro phosphate- and lithium Bis (oxalato) borate-based electrolytes".ELECTROCHIMICA ACTA 273(2018):191-199.