Ion-Dipole Chemistry Drives Rapid Evolution of Li Ions Solvation Sheath in Low-Temperature Li Batteries

doi:10.1002/aenm.202100935

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	Ion-Dipole Chemistry Drives Rapid Evolution of Li Ions Solvation Sheath in Low-Temperature Li Batteries
	Wang, Zhenxing 1,2; Sun, Zhenhua 2; Shi, Ying 1,2; Qi, Fulai 2; Gao, Xuning 1,2; Yang, Huicong 1,2; Cheng, Hui-Ming 2,3; Li, Feng 1,2
刊名	ADVANCED ENERGY MATERIALS
	2021-05-28
页码	9
关键词	dielectric constant ion‐ dipole chemistry lithium metal batteries low temperature solvation sheath
ISSN号	1614-6832
DOI	10.1002/aenm.202100935
通讯作者	Sun, Zhenhua(zhsun@imr.ac.cn) ; Li, Feng(fli@imr.ac.cn)
英文摘要	Sluggish evolution of lithium ions' solvation sheath induces large charge-transfer barriers and high ion diffusion barriers through the passivation layer, resulting in undesirable lithium dendrite formation and capacity loss of lithium batteries, especially at low temperatures. Here, an ion-dipole strategy by regulating the fluorination degree of solvating agents is proposed to accelerate the evolution of the Li+ solvation sheath. Ethylene carbonate (EC)-based fluorinated derivatives, fluoroethylene carbonate (FEC) and di-fluoro ethylene carbonate (DFEC) are used as the solvating agents for a high dielectric constant. As the increase of the fluorination degree from EC to FEC and DFEC, the Li+-dipole interaction strength gradually decreases from 1.90 to 1.66 and 1.44 eV, respectively. Consequently, the DFEC-based electrolyte displays six times faster ion desolvation rate than that of a non-fluorinated EC-based electrolyte at -20 degrees C. Furthermore, LiNi0.8Co0.1Mn0.1O2\|\|lithium cells in a DFEC-based electrolyte retain 91% original capacity after 300 cycles at 25 degrees C, and 51% room-temperature capacity at -30 degrees C. By bridging the gap between the ion-dipole interactions and the evolution of Li+ solvation sheath, this work provides a new technique toward rational design of electrolyte engineering for low-temperature lithium batteries.
资助项目	National Natural Science Foundation of China[52020105010] ; National Natural Science Foundation of China[51927803] ; National Natural Science Foundation of China[51972313] ; National Natural Science Foundation of China[51525206] ; National Natural Science Foundation of China[52072378] ; National Key R&D Program of China[2016YFA0200102] ; National Key R&D Program of China[2016YFB0100100] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDA22010602] ; Liaoning Revitalization Talents Program[XLYC1908015] ; Youth Innovation Promotion Association of the Chinese Academy of Sciences[Y201942] ; Special Projects of the Central Government in Guidance of Local Science and Technology Development[2020JH6/10500024]
WOS研究方向	Chemistry ; Energy & Fuels ; Materials Science ; Physics
语种	英语
出版者	WILEY-V C H VERLAG GMBH
WOS记录号	WOS:000655725200001
资助机构	National Natural Science Foundation of China ; National Key R&D Program of China ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Liaoning Revitalization Talents Program ; Youth Innovation Promotion Association of the Chinese Academy of Sciences ; Special Projects of the Central Government in Guidance of Local Science and Technology Development
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/160809]
专题	金属研究所_中国科学院金属研究所
通讯作者	Sun, Zhenhua; Li, Feng
作者单位	1.Univ Sci & Technol China, Sch Mat Sci & Engn, Hefei 230026, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, 72 Wenhua Rd, Shenyang 110016, Peoples R China 3.Tsinghua Univ, Shenzhen Geim Graphene Ctr, Shenzhen Int Grad Sch, Shenzhen 518055, Peoples R China
推荐引用方式 GB/T 7714	Wang, Zhenxing,Sun, Zhenhua,Shi, Ying,et al. Ion-Dipole Chemistry Drives Rapid Evolution of Li Ions Solvation Sheath in Low-Temperature Li Batteries[J]. ADVANCED ENERGY MATERIALS,2021:9.
APA	Wang, Zhenxing.,Sun, Zhenhua.,Shi, Ying.,Qi, Fulai.,Gao, Xuning.,...&Li, Feng.(2021).Ion-Dipole Chemistry Drives Rapid Evolution of Li Ions Solvation Sheath in Low-Temperature Li Batteries.ADVANCED ENERGY MATERIALS,9.
MLA	Wang, Zhenxing,et al."Ion-Dipole Chemistry Drives Rapid Evolution of Li Ions Solvation Sheath in Low-Temperature Li Batteries".ADVANCED ENERGY MATERIALS (2021):9.