Low viscous and highly conductive phosphonium ionic liquids based on bis(fluorosulfonyl)amide anion as potential electrolytes
作者:Katsuhiko Tsunashima、Atsuko Kawabata、Masahiko Matsumiya、Shun Kodama、Ryuichi Enomoto、Masashi Sugiya、Yoshihito Kunugi
DOI:10.1016/j.elecom.2010.12.007
日期:2011.2
The physical and electrochemical properties of room-temperature ionic liquids based on quaternary phosphonium cations together with a bis(fluorosulfonyl)amide anion are presented in this report. The bis (fluorosulfonyl)amide-based phosphonium ionic liquids were relatively low-melting, low viscous and highly conductive when compared to those of the corresponding bis(trifluoromethylsulfonyl)amide-based ionic liquids. Particularly, the ionic liquids containing a methoxy group in the phosphonium cations indicated very low viscosities and high conductivities. The FSA-based phosphonium RTILs were thermally stable up to nearly 300 degrees C. The voltammetric analysis suggested that the bis(fluorosulfonyl)amide-based phosphonium ionic liquids showed high electrochemical stability similar to the corresponding bis(trifluoromethylsulfonyl) amide-based ionic liquids. (C) 2010 Elsevier B.V. All rights reserved.