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DOI	10.1016/j.scib.2020.07.009
	“Water in salt/ionic liquid” electrolyte for 2.8 V aqueous lithium-ion capacitor
	Dou Q.; Wang Y.; Wang A.; Ye M.; Hou R.; Lu Y.; Su L.; Shi S.; Zhang H.; Yan X.
发表日期	2020
ISSN	20959273
起始页码	1812
结束页码	1822
卷号	65 期号:21
英文摘要	Development of high-voltage electrolytes with non-flammability is significantly important for future energy storage devices. Aqueous electrolytes are inherently non-flammable, easy to handle, and their electrochemical stability windows (ESWs) can be considerably expanded by increasing electrolyte concentrations. However, further breakthroughs of their ESWs encounter bottlenecks because of the limited salt solubility, leading to that most of the high-energy anode materials can hardly function reversibly in aqueous electrolytes. Here, by introducing a non-flammable ionic liquid as co-solvent in a lithium salt/water system, we develop a “water in salt/ionic liquid” (WiSIL) electrolyte with extremely low water content. In such WiSIL electrolyte, commercial niobium pentoxide (Nb2O5) material can operate at a low potential (−1.6 V versus Ag/AgCl) and contribute its full capacity. Consequently, the resultant Nb2O5-based aqueous lithium-ion capacitor is able to operate at a high voltage of 2.8 V along with long cycling stability over 3000 cycles, and displays comparable energy and power performance (51.9 Wh kg−1 at 0.37 kW kg−1 and 16.4 Wh kg−1 at 4.9 kW kg−1) to those using non-aqueous electrolytes but with improved safety performance and manufacturing efficiency. © 2020 Science China Press
关键词	Aqueous electrolyte Electrochemical stability window Lithium-ion capacitor Niobium pentoxide
英文关键词	Anodes; Electric energy storage; Electrolytes; Flammability; Ionic liquids; Lithium; Niobium oxide; Supercapacitor; Aqueous electrolyte; Electrochemical stabilities; Electrolyte concentration; Lithium-ion capacitors; Manufacturing efficiency; Niobium pentoxide; Non-aqueous electrolytes; Safety performance; Electrolytic capacitors
语种	英语
来源期刊	Science Bulletin
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/207027
作者单位	Laboratory of Clean Energy Chemistry and Materials, State Key Laboratory of Solid Lubrication, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou, 730000, China; Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, 100049, China; Dalian National Laboratory for Clean Energy, Dalian, 116000, China; School of Physical Science and Technology, Lanzhou University, Lanzhou, 730000, China; School of Materials Science and Engineering, Shanghai University, Shanghai, 200444, China; Materials Genome Institute, Shanghai University, Shanghai, 200444, China; School of Petrochemical Engineering, Lanzhou University of Technology, Lanzhou, 730050, China; Division of Energy Storage, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China
推荐引用方式 GB/T 7714	Dou Q.,Wang Y.,Wang A.,等. “Water in salt/ionic liquid” electrolyte for 2.8 V aqueous lithium-ion capacitor[J],2020,65(21).
APA	Dou Q..,Wang Y..,Wang A..,Ye M..,Hou R..,...&Yan X..(2020).“Water in salt/ionic liquid” electrolyte for 2.8 V aqueous lithium-ion capacitor.Science Bulletin,65(21).
MLA	Dou Q.,et al."“Water in salt/ionic liquid” electrolyte for 2.8 V aqueous lithium-ion capacitor".Science Bulletin 65.21(2020).