|
|||||
|
|
Ionic liquid electrolytes based on multi-methoxyethyl substituted ammoniums and perfluorinated sulfonimides: Preparation, characterization, and properties |
|
| Authors: | Hong-Bo Han Shao-Wei Feng Wen-Fang Feng Jin Nie Hong Li Hajime Matsumoto Zhi-Bin Zhou |
| Affiliation: | a School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, 1037 Luoyu Road, Wuhan 430074, PR China b Institute of Physics, Chinese Academy of Sciences, 3rd South Street, Zhongguancun, Beijing 100080, PR China c Research Institute for Ubiquitous Energy Devices, National Institute of Advanced Industrial Science and Technology, 1-8-31 Midorigaoka, Ikeda, Osaka 563-8577, Japan d Laboratoire de Réactivité et de Chimie des Solides (LRCS), CNRS 6007, UPJV, 33 rue St. Leu, 80039 Amiens, France |
| Abstract: | New functionalized ionic liquids (ILs), comprised of multi-methoxyethyl substituted quaternary ammonium cations (i.e. N(CH2CH2OCH3)4−n(R)n]+; n = 1, R = CH3OCH2CH2; n = 1, R = CH3, CH2CH3; n = 2, R = CH3CH2), and two representative perfluorinated sulfonimide anions (i.e. bis(fluorosulfonyl)imide (FSI−) and bis(trifluoromethanesulfonyl)imide (TFSI−)), were prepared. Their fundamental properties, including phase transition, thermal stability, viscosity, density, specific conductivity and electrochemical window, were extensively characterized. These multi-ether functionalized ionic liquids exhibit good capability of dissolving lithium salts. Their binary electrolytes containing high concentration of the corresponding lithium salt (Li+] >1.6 mol kg−1) show Li+ ion transference number (tLi+) as high as 0.6-0.7. Their electrochemical stability allows Li deposition/stripping realized at room temperature. The desired properties of these multi-ether functionalized ionic liquids make them potential electrolytes for Li (or Li-ion) batteries. |
| Keywords: | Ionic liquids Perfluorinated sulfonimide Ammonium Electrolytes Li batteries |
| 本文献已被 ScienceDirect 等数据库收录！ | |