A bifunctional fluorinated ether co-solvent for dendrite-free and long-term lithium metal batteries

doi:10.1016/j.nanoen.2022.107014

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	A bifunctional fluorinated ether co-solvent for dendrite-free and long-term lithium metal batteries
	Zhang, Guangzhao 6; Deng, Xiaolan 1; Li, Jiawei 7; Wang, Jun 6; Shi, Guoli 1; Yang, Yu 4; Chang, Jian 6; Yu, Kai 6; Chi, Shang-Sen 6; Wang, Hui 1
刊名	NANO ENERGY
	2022-05-01
卷号	95 页码:11
关键词	Bifunction Partial fluorinated solvent High Li reversibility Li metal Long cycling
ISSN号	2211-2855
DOI	10.1016/j.nanoen.2022.107014
通讯作者	Zheng, Zijian(tczzheng@polyu.edu.hk) ; Deng, Yonghong(yhdeng08@163.com) ; Wang, Chaoyang(zhywang@scut.edu.cn)
英文摘要	The employment of localized high concentration electrolytes (LHCEs) has been demonstrated as an effective strategy for the fabrication of next-generation high-energy-density lithium metal batteries. However, the low ionic conductivity of LHCEs and their parasitic side reactions with lithium metal anodes severely hinder the cycling stability of lithium metal batteries. Herein, a partially fluorinated ether of bis (2,2-difluoroethyl) ether (BDE) is proposed as a bifunctional co-solvent to form novel LHCEs for realizing dendrite-free and long-term lithium metal batteries. The BDE co-solvent serves as a diluent to improve the ionic conductivity up to 6.4 mS/cm by dissociating lithium salt via weak interaction and decreasing the electrolyte viscosity. In addition, the BDE co-solvent could promote the formation of uniform lithium fluoride (LiF)-rich solid electrolyte interphase (SEI) to suppress the dendrite deposition by regulating the solvation shell structure, resulting in high Coulombic efficiency of 99.6%. As a result, the assembled full cell exhibits outstanding cycling stability (97% capacity retention after 200 cycles @0.5 C) with high areal capacity (2 mAh/cm(2)) and high rate capability (2 C) under practical conditions (50 mu m Li, lean electrolyte: 3 g/Ah). We also demonstrate the real application of electrolyte with a commercial cathode in 320-mAh-level pouch cells.
资助项目	Key-Area Research and Development Program of Guangdong Province[2019B090908001] ; Key-Area Research and Development Program of Guangdong Province[2020B090919001] ; Science and Technology Planning Project of Guangdong Province[2021A0505110001] ; Guangdong Basic and Applied Basic Research Foundation[2019A1515010595] ; Guangdong Basic and Applied Basic Research Foundation[2020A1515110300] ; Science and Technology Program of Guangzhou[202002030307] ; Shenzhen Municipal Science and Technology Innovation Commission[SGDX2019081623220944]
WOS研究方向	Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000782124200002
内容类型	期刊论文
源URL	[http://ir.qdio.ac.cn/handle/337002/178783]
专题	海洋研究所_海洋腐蚀与防护研究发展中心
通讯作者	Zheng, Zijian; Deng, Yonghong; Wang, Chaoyang
作者单位	1.South China Univ Technol, Res Inst Mat Sci, Guangzhou 510640, Peoples R China 2.Hong Kong Polytech Univ, Res Inst Smart Energy & Res Inst Intelligent Wear, Hong Kong, Peoples R China 3.Hong Kong Polytech Univ, Inst Text & Clothing, Hong Kong, Peoples R China 4.South China Agr Univ, Coll Mat & Energy, Guangzhou 510642, Peoples R China 5.Shenzhen CAPCHEM Technol Co Ltd, Shenzhen 518118, Peoples R China 6.Southern Univ Sci & Technol, Acad Adv Interdisciplinary Studies, Dept Mat Sci & Engn, Shenzhen 518055, Peoples R China 7.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Environm Corros & Biofouling, Qingdao 266071, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Guangzhao,Deng, Xiaolan,Li, Jiawei,et al. A bifunctional fluorinated ether co-solvent for dendrite-free and long-term lithium metal batteries[J]. NANO ENERGY,2022,95:11.
APA	Zhang, Guangzhao.,Deng, Xiaolan.,Li, Jiawei.,Wang, Jun.,Shi, Guoli.,...&Wang, Chaoyang.(2022).A bifunctional fluorinated ether co-solvent for dendrite-free and long-term lithium metal batteries.NANO ENERGY,95,11.
MLA	Zhang, Guangzhao,et al."A bifunctional fluorinated ether co-solvent for dendrite-free and long-term lithium metal batteries".NANO ENERGY 95(2022):11.