Analysis of Main Factors Limiting the Improvement of Electrochemical Performances of Low-Concentration Electrolyte

doi:10.1002/ente.202101146

IR > 石油化工学院

	Analysis of Main Factors Limiting the Improvement of Electrochemical Performances of Low-Concentration Electrolyte
	Li, Shiyou1,2,3 ; Quan, Yin 1,2; Zhang, Ningshuang1,2,3 ; Zhao, Dongni1,2,3 ; Zhang, Feilong 1,2,3; Wang, Peng 1,2; Wang, Jie 1,2; Gao, Cankun 1,2
	2022-05
发表期刊	ENERGY TECHNOLOGY
ISSN	2194-4288
卷号	10 期号:5
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.
关键词	desolvation processes LFP electrolyte interface LiF lithium bonds low-concentration electrolytes
DOI	10.1002/ente.202101146
收录类别	SCIE ; EI
语种	英语
WOS研究方向	Energy & Fuels
WOS类目	Energy & Fuels
WOS记录号	WOS:000771985900001
出版者	WILEY-V C H VERLAG GMBH
EI入藏号	20221311845977
EI主题词	Fluorine compounds
EI分类号	702 Electric Batteries and Fuel Cells ; 803 Chemical Agents and Basic Industrial Chemicals ; 804 Chemical Products Generally ; 804.1 Organic Compounds ; 804.2 Inorganic Compounds
来源库	WOS
引用统计	被引频次：1[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	https://ir.lut.edu.cn/handle/2XXMBERH/158081
专题	石油化工学院
通讯作者	Li, Shiyou
作者单位	1.Lanzhou Univ Technol, Sch Petrochem Technol, Lanzhou 730050, Peoples R China; 2.Lanzhou Univ Technol, Gansu Engn Lab Electrolyte Mat Lithium Ion Batter, Baiyin 730050, Peoples R China; 3.Lanzhou Univ Technol, Key Lab Low Carbon Energy & Chem Engn Gansu Prov, Lanzhou 730050, Peoples R China
第一作者单位	兰州理工大学
通讯作者单位	兰州理工大学
第一作者的第一单位	兰州理工大学
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).