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

文献类型：期刊论文

作者Zhang, Guangzhao3; Deng, Xiaolan2; Li, Jiawei4; Wang, Jun3; Shi, Guoli2; Yang, Yu5; Chang, Jian3; Yu, Kai3; Chi, Shang-Sen3; Wang, Hui2
刊名NANO ENERGY
出版日期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
DOI10.1016/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
WOS记录号WOS:000782124200002
出版者ELSEVIER
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.Shenzhen CAPCHEM Technol Co Ltd, Shenzhen 518118, Peoples R China
2.South China Univ Technol, Res Inst Mat Sci, Guangzhou 510640, Peoples R China
3.Southern Univ Sci & Technol, Acad Adv Interdisciplinary Studies, Dept Mat Sci & Engn, Shenzhen 518055, Peoples R China
4.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Environm Corros & Biofouling, Qingdao 266071, Peoples R China
5.South China Agr Univ, Coll Mat & Energy, Guangzhou 510642, Peoples R China
6.Hong Kong Polytech Univ, Res Inst Smart Energy & Res Inst Intelligent Wear, Hong Kong, Peoples R China
7.Hong Kong Polytech Univ, Inst Text & Clothing, Hong Kong, 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.

入库方式： OAI收割

来源：海洋研究所

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