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DOI	10.1039/c8ee01040d
	Safe and high-rate supercapacitors based on an "acetonitrile/water in salt" hybrid electrolyte
	Dou Q.; Lei S.; Wang D.-W.; Zhang Q.; Xiao D.; Guo H.; Wang A.; Yang H.; Li Y.; Shi S.; Yan X.
发表日期	2018
ISSN	17545692
起始页码	3212
结束页码	3219
卷号	11 期号:11
英文摘要	The properties of the electrolyte are the dominant factors for the overall performance and safety of electrical energy storage devices. Highly concentrated "water in salt" (WIS) electrolytes are inherently non-flammable, moisture-tolerant, and exhibit wide electrochemical stability windows, making them promising electrolytes for high-performance energy storage devices. However, WIS electrolytes possess intrinsically low conductivity and high viscosity, which usually impair the high-rate performance of many energy storage devices, especially supercapacitors (SCs). Additionally, the inevitable salt precipitation at low temperature for WIS electrolytes narrows down their applicable temperature range. Here, we introduce acetonitrile as a co-solvent to a typical "water in salt" electrolyte to formulate an "acetonitrile/water in salt" (AWIS) hybrid electrolyte that provides significantly improved conductivity, reduced viscosity and an expanded applicable temperature range while maintaining the aforementioned important physicochemical properties of WIS electrolytes. Using the AWIS electrolyte for a model SC remarkably enhances the high-rate performance, accompanied by a 2.4 times capacitance increase at 10 A g-1 with respect to the original WIS electrolyte. This AWIS electrolyte also enables a stable long-term cycling capability of the model SC for over 14000 cycles at a high operation voltage of 2.2 V. © The Royal Society of Chemistry 2018.
英文关键词	Acetonitrile; Capacitance; Electrolytic capacitors; Energy storage; Organic solvents; Precipitation (chemical); Supercapacitor; Temperature; Viscosity; Electrical energy storage devices; Electrochemical stabilities; High operation voltage; High-rate performance; Hybrid electrolytes; Physicochemical property; Reduced viscosity; Salt precipitation; Electrolytes; electrical conductivity; electrochemistry; electrolyte; energy storage; equipment; low temperature; performance assessment; physicochemical property; precipitation (chemistry)
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/190087
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; University of Chinese Academy of Sciences, Beijing, 100039, China; School of Chemical Engineering, University of New South Wales, Sydney, NSW 2052, Australia; School of Materials Science and Engineering, Anhui University of Technology, Ma'anshan, 243000, China; Department of Chemical Engineering and Technology, School of Petrochemical Engineering, Lanzhou University of Technology, Lanzhou, 730050, China; School of Materials Science and Engineering, Shanghai University, Shanghai, 200444, China; Materials Genome Institute, Shanghai University, Shanghai, 200444, China; Department of Physics, International Center for Quantum and Molecular Structures, Shanghai Key Laboratory of High Temperature Superconductors, Shanghai, 200444, China
推荐引用方式 GB/T 7714	Dou Q.,Lei S.,Wang D.-W.,et al. Safe and high-rate supercapacitors based on an "acetonitrile/water in salt" hybrid electrolyte[J],2018,11(11).
APA	Dou Q..,Lei S..,Wang D.-W..,Zhang Q..,Xiao D..,...&Yan X..(2018).Safe and high-rate supercapacitors based on an "acetonitrile/water in salt" hybrid electrolyte.Energy & Environmental Science,11(11).
MLA	Dou Q.,et al."Safe and high-rate supercapacitors based on an "acetonitrile/water in salt" hybrid electrolyte".Energy & Environmental Science 11.11(2018).