Influences and Mechanisms of Water on a Solid Electrolyte Interphase Film for Lithium-Ion Batteries

doi:10.1021/acsaem.0c02486

CORC > 兰州理工大学 > 兰州理工大学 > 石油化工学院

	Influences and Mechanisms of Water on a Solid Electrolyte Interphase Film for Lithium-Ion Batteries
	Li, Zhaojuan 1; Xu, Fei 1; Li, Chunlei 1; Wang, Peng 1; Yi, Wentao 2; Wang, Shengxian 1; Yang, Li 1; Yan, Chunyan 2; Li, Shiyou 1
刊名	ACS APPLIED ENERGY MATERIALS
	2021
卷号	4 期号:2 页码:1199-1207
关键词	lithium-ion battery water content solid electrolyte interphase film lithium bis(oxalato)borate solvation structure
ISSN号	2574-0962
DOI	10.1021/acsaem.0c02486
英文摘要	Trace water, one of the most common impurities, has a fatal influence on the performance of lithium-ion batteries (LIBs). In this work, the influences of water content on the solvation structure of lithium ions and the component of solid electrolyte interphase (SEI) film in the lithium bis(oxalato)borate (LiBOB)-ethylene carbonate (EC)/diethyl carbonate electrolyte (DEC) system are studied. Results of attenuated total reflection-Fourier transform infrared analysis and density functional theory (DFT) calculation show that a great number of solvation structures of Li+(EC)(2)(H2O)(2) and Li+(EC)(3)(H2O) are formed in the electrolyte system with additional H2O. Besides, the free H2O generated by the desolvation effect will react with the desolvated Li+ ions and the heterogeneous organic components in the outer layer of a SEI film. These parasitic reactions will lead to an overgrown and excessive inorganic componentcontaining SEI film, which harms the Li+ ion conductive characteristics of the SEI film and the electrochemical performance of LIBs. In particular, insoluble LiB(C2O4)(OH)(2) and B(C2O4)OH products are generated when the content of the additional H2O reaches 10,000 ppm because of the hydrolytic reaction. Moreover, it is because of the generation of these poor ion-conductive boron-containing substances that the impedance of the cell increases sharply. These studies can provide the theoretical basis for battery failure analysis.
WOS研究方向	Chemistry ; Energy & Fuels ; Materials Science
语种	英语
出版者	AMER CHEMICAL SOC
WOS记录号	WOS:000621660800019
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/147454]
专题	石油化工学院马克思主义学院
作者单位	1.Lanzhou Univ Technol, Coll Petrochem Technol, Lanzhou 730050, Peoples R China; 2.Zaozhuang Univ, Coll Chem Chem Engn & Mat Sci, Zaozhuang 277160, Peoples R China
推荐引用方式 GB/T 7714	Li, Zhaojuan,Xu, Fei,Li, Chunlei,et al. Influences and Mechanisms of Water on a Solid Electrolyte Interphase Film for Lithium-Ion Batteries[J]. ACS APPLIED ENERGY MATERIALS,2021,4(2):1199-1207.
APA	Li, Zhaojuan.,Xu, Fei.,Li, Chunlei.,Wang, Peng.,Yi, Wentao.,...&Li, Shiyou.(2021).Influences and Mechanisms of Water on a Solid Electrolyte Interphase Film for Lithium-Ion Batteries.ACS APPLIED ENERGY MATERIALS,4(2),1199-1207.
MLA	Li, Zhaojuan,et al."Influences and Mechanisms of Water on a Solid Electrolyte Interphase Film for Lithium-Ion Batteries".ACS APPLIED ENERGY MATERIALS 4.2(2021):1199-1207.