Nonpolar Cosolvent Driving LUMO Energy Evolution of Methyl Acetate Electrolyte to Afford Lithium-Ion Batteries Operating at-60 degrees C

doi:10.1002/adfm.202301028

IMR OpenIR

	Nonpolar Cosolvent Driving LUMO Energy Evolution of Methyl Acetate Electrolyte to Afford Lithium-Ion Batteries Operating at-60 degrees C
	Lei, Sheng 1,2; Zeng, Ziqi 1; Yan, Hui 3; Qin, Mingsheng 1,2; Liu, Mengchuang 1,4; Wu, Yuanke 1,2; Zhang, Han 1,2; Cheng, Shijie 1; Xie, Jia 1
通讯作者	Zeng, Ziqi(ziqizeng@hust.edu.cn) ; Xie, Jia(xiejia@hust.edu.cn)
	2023-05-14
发表期刊	ADVANCED FUNCTIONAL MATERIALS
ISSN	1616-301X
页码	10
摘要	The operation of lithium-ion batteries (LIBs) at low temperatures (<-20 degrees C) is hindered by the low conductivity and high viscosity of conventional carbonate electrolytes. Methyl acetate (MA) has proven to be a competitive low-temperature electrolyte solvent with low viscosity and low freezing point, but its interfacial stability is poor and remains elusive until now. Here, it is revealed thaat the reductive stability of MA-based electrolytes is fundamentally governed by the anion-prevailed solvation structure. Based on this framework, fluorobenzene is employed in the electrolyte to promote the entry of anions into the solvation shell via dipole-dipole interactions and the generation of free MA, thus enhancing the lowest unoccupied molecular orbital energy of MA. The designed electrolyte enables LiCoO2 (LCO)/graphite cells to exhibit excellent cycling performance at -20 degrees C (90% retention after 1000 cycles at 1 C) and to remain 91% of their room-temperature capacity at a super-low temperature of -60 degrees C at 0.05 C. Thanks to the plentiful free MA, this electrolyte has a high conductivity (2.61 mS cm(-1)) at -60 degrees C and allows LCO/graphite cell to charge at -60 degrees C. This study offers the possibility of practical applications for those solvents with poor reductive stability and provides new approaches to designing advanced electrolytes for low-temperature applications.
关键词	lithium-ion batteries low-temperature methyl acetate reductive stability
资助者	National Key Research and Development Program of China ; National Natural Science Foundation of China
DOI	10.1002/adfm.202301028
收录类别	SCI
语种	英语
资助项目	National Key Research and Development Program of China[2022YFB2404800] ; National Natural Science Foundation of China[U1966214] ; National Natural Science Foundation of China[22008082]
WOS研究方向	Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics
WOS类目	Chemistry, Multidisciplinary ; Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter
WOS记录号	WOS:000987348900001
出版者	WILEY-V C H VERLAG GMBH
引用统计	被引频次：40[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/321006/178112
专题	中国科学院金属研究所
通讯作者	Zeng, Ziqi; Xie, Jia
作者单位	1.Huazhong Univ Sci & Technol, Sch Elect & Elect Engn, State Key Lab Adv Electromagnet Engn & Technol, Wuhan 430074, Peoples R China 2.Huazhong Univ Sci & Technol, Sch Mat Sci & Engn, State Key Lab Mat Proc & Die & Mould Technol, Wuhan 430074, Peoples R China 3.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China 4.Huazhong Univ Sci & Technol, Sch Chem & Chem Engn, Wuhan 430074, Peoples R China
推荐引用方式 GB/T 7714	Lei, Sheng,Zeng, Ziqi,Yan, Hui,et al. Nonpolar Cosolvent Driving LUMO Energy Evolution of Methyl Acetate Electrolyte to Afford Lithium-Ion Batteries Operating at-60 degrees C[J]. ADVANCED FUNCTIONAL MATERIALS,2023:10.
APA	Lei, Sheng.,Zeng, Ziqi.,Yan, Hui.,Qin, Mingsheng.,Liu, Mengchuang.,...&Xie, Jia.(2023).Nonpolar Cosolvent Driving LUMO Energy Evolution of Methyl Acetate Electrolyte to Afford Lithium-Ion Batteries Operating at-60 degrees C.ADVANCED FUNCTIONAL MATERIALS,10.
MLA	Lei, Sheng,et al."Nonpolar Cosolvent Driving LUMO Energy Evolution of Methyl Acetate Electrolyte to Afford Lithium-Ion Batteries Operating at-60 degrees C".ADVANCED FUNCTIONAL MATERIALS (2023):10.