Unique double-layer solid electrolyte interphase formed with fluorinated ether-based electrolytes for high-voltage lithium metal batteries

doi:10.1016/j.jechem.2023.10.002

	Unique double-layer solid electrolyte interphase formed with fluorinated ether-based electrolytes for high-voltage lithium metal batteries
	Wang, Ruo 1,2; Li, Jiawei 3; Han, Bing 1; Wang, Qingrong 1; Ke, Ruohong 1; Zhang, Tong 1; Ao, Xiaohu 4; Zhang, Guangzhao 1; Liu, Zhongbo 4; Qian, Yunxian 4; Pan, Fangfang 5; Lynch, Iseult 2; Wang, Jun 1; Deng, Yonghong 1
	2024
发表期刊	JOURNAL OF ENERGY CHEMISTRY
ISSN	2095-4956
卷号	88 页码:532-542
通讯作者	Zhang, Guangzhao(zhanggz@sustech.edu.cn) ; Lynch, Iseult(i.lynch@bham.ac.uk) ; Wang, Jun(wangj9@sustech.edu.cn) ; Deng, Yonghong(yhdeng08@163.com)
摘要	Li metal batteries using high-voltage layered oxides cathodes are of particular interest due to their high energy density. However, they suffer from short lifespan and extreme safety concerns, which are attributed to the degradation of layered oxides and the decomposition of electrolyte at high voltage, as well as the high reactivity of metallic Li. The key is the development of stable electrolytes against both high-voltage cathodes and Li with the formation of robust interphase films on the surfaces. Herein, we report a highly fluorinated ether, 1,1,1-trifluoro-2-[(2,2,2-trifluoroethoxy) methoxy] ethane (TTME), as a co-solvent, which not only functions as a diluent forming a localized high concentration electrolyte (LHCE), but also participates in the construction of the inner solvation structure. The TTME-based electrolyte is stable itself at high voltage and induces the formation of a unique double-layer solid electrolyte interphase (SEI) film, which is embodied as one layer rich in crystalline structural components for enhanced mechanical strength and another amorphous layer with a higher concentration of organic components for enhanced flexibility. The Li\|\|Cu cells display a noticeably high Coulombic efficiency of 99.28% after 300 cycles and Li symmetric cells maintain stable cycling more than 3200 h at 0.5 mA/cm(2) and 1.0 mAh/cm(2). In addition, lithium metal cells using LiNi0.8Co0.1Mn0.1O2 and LiCoO2 cathodes (both loadings similar to 3.0 mAh/cm(2)) realize capacity retentions of >85% over 240 cycles with a charge cut-off voltage of 4.4 V and 90% for 170 cycles with a charge cut-off voltage of 4.5 V, respectively. This study offers a bifunctional ether-based electrolyte solvent beneficial for high-voltage Li metal batteries.
关键词	Lithium metal batteries High-voltage layered oxides Fluorinated ether-based electrolytes Solid electrolyte interphase Cathode electrolyte interphase
DOI	10.1016/j.jechem.2023.10.002
收录类别	SCI
语种	英语
资助项目	Key-Area Research and Development Program of Guangdong Province[2020B090919001] ; National Natural Science Foundation of China[22078144] ; Guangdong Natural Science Foundation for Basic and Applied Basic Research[2021A1515010138] ; Guangdong Natural Science Foundation for Basic and Applied Basic Research[2023A1515010686]
WOS研究方向	Chemistry ; Energy & Fuels ; Engineering
WOS类目	Chemistry, Applied ; Chemistry, Physical ; Energy & Fuels ; Engineering, Chemical
WOS记录号	WOS:001114368900001
出版者	ELSEVIER
WOS关键词	ANODE
引用统计	被引频次：2[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/184011
专题	海洋环境腐蚀与生物污损重点实验室
通讯作者	Zhang, Guangzhao; Lynch, Iseult; Wang, Jun; Deng, Yonghong
作者单位	1.Southern Univ Sci & Technol, Sch Innovat & Entrepreneurship, Dept Mat Sci & Engn, Shenzhen 518055, Guangdong, Peoples R China 2.Univ Birmingham, Sch Geog Earth & Environm Sci, Birmingham B15 2TT, England 3.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Environm Corros & Biofouling, Qingdao 266071, Shandong, Peoples R China 4.Shenzhen CAPCHEM Technol Co Ltd, Shenzhen 518118, Guangdong, Peoples R China 5.CALB Grp Co Ltd, Changzhou 213200, Jiangsu, Peoples R China
推荐引用方式 GB/T 7714	Wang, Ruo,Li, Jiawei,Han, Bing,et al. Unique double-layer solid electrolyte interphase formed with fluorinated ether-based electrolytes for high-voltage lithium metal batteries[J]. JOURNAL OF ENERGY CHEMISTRY,2024,88:532-542.
APA	Wang, Ruo.,Li, Jiawei.,Han, Bing.,Wang, Qingrong.,Ke, Ruohong.,...&Deng, Yonghong.(2024).Unique double-layer solid electrolyte interphase formed with fluorinated ether-based electrolytes for high-voltage lithium metal batteries.JOURNAL OF ENERGY CHEMISTRY,88,532-542.
MLA	Wang, Ruo,et al."Unique double-layer solid electrolyte interphase formed with fluorinated ether-based electrolytes for high-voltage lithium metal batteries".JOURNAL OF ENERGY CHEMISTRY 88(2024):532-542.