Investigating the electrochemical windows of ionic liquids

CATEGORY: IONIC LIQUIDS
Journal of Industrial and Engineering Chemistry, Volume 19, Issue 1, 25 January 2013, Pages 106–112
Investigating the electrochemical windows of ionic liquids
Maan Hayyan (a), Farouq S. Mjalli (b), Mohd Ali Hashim (a), Inas M. AlNashef (c), Tan Xue Mei (d)
a Department of Chemical Engineering, Centre for Ionic Liquids (UMCiL), University of Malaya, Kuala Lumpur 50603, Malaysia
b Petroleum & Chemical Engineering Department, Sultan Qaboos University, Muscat 123, Oman
c Chemical Engineering Department, King Saud University, Riyadh 11421, Saudi Arabia
d Department of Civil Engineering, Gifu University, Gifu City 501-1193, Japan
Abstract
A team of researchers from Malaysia, Oman, Saudi Arabia, and Japan investigated the structure effect on the electrochemical windows (EWs) using cyclic voltammetry (CV) in 16 ionic liquids (ILs), consisting of a variety of cations. These included piperidinium, pyridinium, pyrrolidinium, phosphonium, morpholinium, ammonium, sulfonium and imidazolium, and anions including bis(trifluoromethylsulfonyl)imide, tris(pentafluoroethyl)trifluorophosphate, dicyanamide, trifluoroacetate and trifluoromethanesulfonate.
They observed that all studied ILs have good EWs to be utilized as electrolytes in different electrochemical applications pertaining to industry. They also observed that the structure of ILs affected the EW and both the cation and anion have important effect on the reductive and oxidative limits, respectively.
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