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DOI	10.1039/d0ee00694g
	Bridging the immiscibility of an all-fluoride fire extinguishant with highly-fluorinated electrolytes toward safe sodium metal batteries
	Zheng X.; Gu Z.; Liu X.; Wang Z.; Wen J.; Wu X.; Luo W.; Huang Y.
发表日期	2020
ISSN	17545692
起始页码	1788
结束页码	1798
卷号	13 期号:6
英文摘要	Room-temperature sodium metal batteries with metallic Na anodes and flammable organic solvent-based electrolytes are breeding severe safety concerns. Herein, by introducing non-flammable, highly-fluorinated ethers as bridge solvents, we enable superior miscibility of an all-fluoride fire extinguishant into fluorinated carbonate electrolytes. Besides the intrinsic non-flammability of the designed electrolyte, the embedded PFMP extinguishant further enhances the battery safety by its efficacy to in situ dissipate the internal heat at an elevated temperature (ΔH = +88.1 J g-1). Moreover, the cyclability is greatly improved by using such an electrolyte. The Na/Na symmetrical cells can cycle for 1100 h at 1.0 mA h cm-2 and more than 800 h at 5.0 mA h cm-2. Paired with a high voltage Na3V2(PO4)2O2F cathode, the full cell exhibits a high initial coulombic efficiency of 94.7% and a capacity retention of 87.1% after 1000 cycles at 0.5C, which is mainly ascribed to the thin F-rich interphases established on both the Na metal anode and the cathode. © The Royal Society of Chemistry.
英文关键词	Anodes; Cathodes; Electric batteries; Flammability; Fluorine compounds; Sodium; Battery safety; Capacity retention; Carbonate electrolytes; Elevated temperature; Fluorinated ethers; Initial Coulombic efficiency; Safety concerns; Symmetrical cells; Electrolytes
语种	英语
来源期刊	Energy & Environmental Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/189634
作者单位	Institute of New Energy for Vehicles, Tongji University, Shanghai, 201804, China; Key Laboratory for UV Light-Emitting Materials and Technology of Ministry of Education, National and Local United Engineering Laboratory for Power Batteries, Faculty of Chemistry, Northeast Normal University, Changchun, Jilin, 130024, China
推荐引用方式 GB/T 7714	Zheng X.,Gu Z.,Liu X.,et al. Bridging the immiscibility of an all-fluoride fire extinguishant with highly-fluorinated electrolytes toward safe sodium metal batteries[J],2020,13(6).
APA	Zheng X..,Gu Z..,Liu X..,Wang Z..,Wen J..,...&Huang Y..(2020).Bridging the immiscibility of an all-fluoride fire extinguishant with highly-fluorinated electrolytes toward safe sodium metal batteries.Energy & Environmental Science,13(6).
MLA	Zheng X.,et al."Bridging the immiscibility of an all-fluoride fire extinguishant with highly-fluorinated electrolytes toward safe sodium metal batteries".Energy & Environmental Science 13.6(2020).