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	Analysis of Main Factors Limiting the Improvement of Electrochemical Performances of Low-Concentration Electrolyte
	Li, Shiyou1,2,3; Quan, Yin2,3; Zhang, Ningshuang1,2,3; Zhao, Dongni1,2,3; Zhang, Feilong1,2,3; Wang, Peng2,3; Wang, Jie2,3; Gao, Cankun2,3
刊名	ENERGY TECHNOLOGY
	2022
卷号	10期号:5
关键词	desolvation processes LFP electrolyte interface LiF lithium bonds low-concentration electrolytes
ISSN号	2194-4288
DOI	10.1002/ente.202101146
英文摘要	The low-concentration electrolyte possesses the benefits of desirable wettability, low viscosity, and low cost. However, the mechanism of its poor electrochemical performance is not clear. Herein, the properties of interfacial films on the surface of LiFePO4 (LFP) cathode material formed by electrolytes with different concentrations are compared by interfacial component analysis. It is shown that moderate content of lithium fluoride increases the length of Li+-ethylene carbonate bond from 1.676 to 1.824 angstrom through lithium bond and then decreases the desolvation activity energy of Li+ ion, which effectively promotes the desolvation process of Li+ ion at the interface of LFP/electrolyte, and finally ensures the perfect performance of the battery. That is, the fundamental cause for the undesirable electrochemical performances of the low-concentration electrolyte is the low content of LiF components in the interface film rather than the low ionic conductivity of the electrolyte itself. This indicates the direction of optimizing the electrochemical performance of low-concentration electrolytes.
WOS研究方向	Energy & Fuels
语种	英语
出版者	WILEY-V C H VERLAG GMBH
WOS记录号	WOS:000771985900001
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/158081]
专题	石油化工学院
作者单位	1.Lanzhou Univ Technol, Key Lab Low Carbon Energy & Chem Engn Gansu Prov, Lanzhou 730050, Peoples R China 2.Lanzhou Univ Technol, Sch Petrochem Technol, Lanzhou 730050, Peoples R China; 3.Lanzhou Univ Technol, Gansu Engn Lab Electrolyte Mat Lithium Ion Batter, Baiyin 730050, Peoples R China;
推荐引用方式 GB/T 7714	Li, Shiyou,Quan, Yin,Zhang, Ningshuang,et al. Analysis of Main Factors Limiting the Improvement of Electrochemical Performances of Low-Concentration Electrolyte[J]. ENERGY TECHNOLOGY,2022,10(5).
APA	Li, Shiyou.,Quan, Yin.,Zhang, Ningshuang.,Zhao, Dongni.,Zhang, Feilong.,...&Gao, Cankun.(2022).Analysis of Main Factors Limiting the Improvement of Electrochemical Performances of Low-Concentration Electrolyte.ENERGY TECHNOLOGY,10(5).
MLA	Li, Shiyou,et al."Analysis of Main Factors Limiting the Improvement of Electrochemical Performances of Low-Concentration Electrolyte".ENERGY TECHNOLOGY 10.5(2022).

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