Safe and high-rate supercapacitors based on “acetonitrile/water in salt” hybrid electrolyte | |
Department | 清洁能源化学与材料实验室 |
Qingyun Dou1; Shulai Lei1; Da-Wei Wang2; Qingnuan Zhang1; Dewei Xiao1; Hongwei Guo1; Aiping Wang3; Hui Yang4; Yongle Li4; Siqi Shi3; Xingbin Yan1 | |
2018 | |
Source Publication | Energy & Environmental Science |
Issue | 11Pages:3212 |
Abstract | The properties of electrolyte are the dominant factors to the overall performance and safety of electrical energy storage devices. The 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 the 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 expanded applicable temperature range while maintains the aforementioned important physicochemical properties of WIS electrolyte. Using AWIS electrolyte for a model SC remarkably enhances the high-rate performance, accompanied with 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. |
DOI | 10.1039/c8ee01040d |
If | 30.067 |
Language | 英语 |
compositor | 第一作者单位 |
Citation statistics | |
Document Type | 期刊论文 |
Identifier | http://ir.licp.cn/handle/362003/24471 |
Collection | 清洁能源化学与材料实验室 |
Corresponding Author | Xingbin Yan |
Affiliation | 1.Laboratory of Clean Energy Chemistry and Materials, Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences. 2.School of Chemical Engineering, The University of New South Wales. 3.School of Materials Science and Engineering, Shanghai University. 4.Department of physics, International center for quantum and molecular structures, and Shanghai Key Laboratory of High Temperature Superconductors. |
Recommended Citation GB/T 7714 | Qingyun Dou,Shulai Lei,Da-Wei Wang,等. Safe and high-rate supercapacitors based on “acetonitrile/water in salt” hybrid electrolyte[J]. Energy & Environmental Science,2018(11):3212. |
APA | Qingyun Dou.,Shulai Lei.,Da-Wei Wang.,Qingnuan Zhang.,Dewei Xiao.,...&Xingbin Yan.(2018).Safe and high-rate supercapacitors based on “acetonitrile/water in salt” hybrid electrolyte.Energy & Environmental Science(11),3212. |
MLA | Qingyun Dou,et al."Safe and high-rate supercapacitors based on “acetonitrile/water in salt” hybrid electrolyte".Energy & Environmental Science .11(2018):3212. |
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c8ee01040d.pdf(4002KB) | 期刊论文 | 作者接受稿 | 开放获取 | CC BY-NC-SA | View Application Full Text |
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