New ether-functionalized pyrazolium ionic liquid electrolytes based on the bis(fluorosulfonyl)imide anion for lithium-ion batteries

被引：12
|
作者：
Wang, Guojun [1 ]
Shen, Shumin [1 ]
Fang, Shaohua [1 ,3 ]
Luo, Dong [1 ]
Yang, Li [1 ,2 ,3 ]
Hirano, Shin-ichi [2 ]
机构：
[1] Shanghai Jiao Tong Univ, Sch Chem & Chem Engn, Shanghai 200240, Peoples R China
[2] Shanghai Jiao Tong Univ, Hirano Inst Mat Innovat, Shanghai 200240, Peoples R China
[3] Shanghai Electrochem Energy Devices Res Ctr, Shanghai 200240, Peoples R China
来源：
RSC ADVANCES | 2016年 / 6卷 / 75期
基金：
中国国家自然科学基金;
关键词：
LOW-VISCOSITY; ELECTROCHEMICAL PROPERTIES; PHYSICOCHEMICAL PROPERTIES; SECONDARY BATTERIES; CATIONS; SALTS; CHALLENGES; COMPLEXES; MIXTURE; IMIDES;
D O I：
10.1039/c6ra16348c
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Four new ionic liquids (ILs) composed of ether-functionalized pyrazolium cations and the bis(fluorosulfonyl) imide (FSI) anion are prepared and characterized in this report. The physicochemical properties of these ILs, such as melting point, thermal stability, viscosity, conductivity and electrochemical stability, are systematically investigated. These four FSI-based ILs are all in the liquid state and their viscosities are lower than 40 mPa s at room temperature. The charge-discharge performances of Li/LiFePO4 cells containing these IL electrolytes with 0.8 mol L-1 LiFSI are also examined. Three electrolytes exhibit nice cycling stability at 0.1C, and the PZ2o2-2-FSI electrolyte shows excellent rate performance.
引用
收藏
页码：71489 / 71495
页数：7
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