Dual-additives enable stable electrode-electrolyte interfaces for long life Li-SPAN batteries

doi:10.1016/j.cclet.2023.108622

IMR OpenIR

	Dual-additives enable stable electrode-electrolyte interfaces for long life Li-SPAN batteries
	Guo, Zhenqiang 1,2; Yang, Huicong 1,2; Wei, Qian 1,2; Xu, Shengjun 1,2; Hu, Guangjian 1,2,5; Bai, Shuo 1,2; Li, Feng 1,2,3,4
通讯作者	Hu, Guangjian(gjhu@imr.ac.cn) ; Li, Feng(fli@imr.ac.cn)
	2024-05-01
发表期刊	CHINESE CHEMICAL LETTERS
ISSN	1001-8417
卷号	35 期号:5 页码:7
摘要	Sulfurized polyacrylonitrile (SPAN) is proposed as a promising cathode material for lithium sulfur batteries. However, the continuous side reactions at the electrolyte-electrode interfaces as well as the slow redox kinetics of SPAN cathode deteriorate the electrochemical performance. In this study, an electrolyte with dual-additives comprising 2-fluoropyridine (2-FP) and lithium difluorobis (oxalato) phosphate (LiDFBOP) was used to improve the performance of Li\|\|SPAN cells. 2-FP has a lower lowest occupied molecular orbital energy than that of the solvents in the electrolyte, leading to its prior reduction. A LiF-rich film can be formed on the electrode, effectively improving the stability of the electrolyte-electrode interfaces and prolonging the life. Simultaneously, LiDFBOP could form an electrolyte-electrode interface film containing a large amount of Li x PO y F z species, compensating for the kinetic deterioration caused by the lower ionic conductive of LiF formed at the electrolyte-electrode interface. Hence, an electrode-interface film with good chemical stability and high Li + transport was established by LiF and Li x PO y F z -rich species. The Li\|\|SPAN cell with the electrolyte containing dual-additives demonstrates an excellent capacity retention of 97.5% after 200 cycles at 1.0 C, 25 degrees C, comparing to 56.2% capacity retention without additives. Moreover, the rate capacities of cells with dual-additives can reach 1128.1 mAh/g at 5 C, comparing to only 813.5 mAh/g using electrolyte without additives. Our results shown that the dual-additives in electrolyte provide a promising strategy for practical application of lithium sulfur batteries with SPAN cathodes. (c) 2024 Published by Elsevier B.V. on behalf of Chinese Chemical Society and Institute of Materia Medica, Chinese Academy of Medical Sciences.
关键词	Sulfurized polyacrylonitrile Lithium metal Interface film 2-Fluoropyridine Difluorobis (oxalato) phosphate
资助者	National Natural Science Foundation of China ; National Key R&D Program of China ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Shenyang Science and Technology Program
DOI	10.1016/j.cclet.2023.108622
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[52072378] ; National Natural Science Foundation of China[22209189] ; National Key R&D Program of China[2022YFB3803400] ; Strategic Priority Research Program of the Chinese Academy of Sciences[2022YFB3803400] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDA22010602] ; Shenyang Science and Technology Program[22-322-3-19]
WOS研究方向	Chemistry
WOS类目	Chemistry, Multidisciplinary
WOS记录号	WOS:001221845400001
出版者	ELSEVIER SCIENCE INC
引用统计	被引频次：7[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/185908
专题	中国科学院金属研究所
通讯作者	Hu, Guangjian; Li, Feng
作者单位	1.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China 2.Inst Met Sci & Technol, Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China 3.China Med Univ, Coll Life Sci, Dept Biochem & Mol Biol, Shenyang 110122, Peoples R China 4.Dalian Natl Lab Clean Energy, Dalian 116023, Peoples R China 5.Shenyang King Power Technol Co Ltd, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Guo, Zhenqiang,Yang, Huicong,Wei, Qian,et al. Dual-additives enable stable electrode-electrolyte interfaces for long life Li-SPAN batteries[J]. CHINESE CHEMICAL LETTERS,2024,35(5):7.
APA	Guo, Zhenqiang.,Yang, Huicong.,Wei, Qian.,Xu, Shengjun.,Hu, Guangjian.,...&Li, Feng.(2024).Dual-additives enable stable electrode-electrolyte interfaces for long life Li-SPAN batteries.CHINESE CHEMICAL LETTERS,35(5),7.
MLA	Guo, Zhenqiang,et al."Dual-additives enable stable electrode-electrolyte interfaces for long life Li-SPAN batteries".CHINESE CHEMICAL LETTERS 35.5(2024):7.