화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Journal of Industrial and Engineering Chemistry, Vol.19, No.1, 106-112, January, 2013
DOI10.1016/j.jiec.2012.07.011  Export Citation
Investigating the electrochemical windows of ionic liquids
Maan Hayyan, Farouq S. Mjalli1, †, Mohd Ali Hashim, Inas M. AlNashef2, and Tan Xue Mei3
  • Department of Chemical Engineering, Centre for Ionic Liquids (UMCiL), University of Malaya, Kuala Lumpur 50603, Malaysia
  • 1Petroleum & Chemical Engineering Department, Sultan Qaboos University, Muscat 123, Oman
  • 2Chemical Engineering Department, King Saud University, Riyadh 11421, Saudi Arabia
  • 3Department of Civil Engineering, Gifu University, Gifu City 501-1193, Japan
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The structure effect on the electrochemical windows (EWs) was studied using cyclic voltammetry (CV) in 16 ionic liquids (ILs), consisting of various cations such as piperidinium, pyridinium, pyrrolidinium, phosphonium, morpholinium, ammonium, sulfonium and imidazolium, and anions including bis(trifluoromethylsulfonyl) imide, tris(pentafluoroethyl)trifluorophosphate, dicyanamide, trifluoroacetate and trifluoromethanesulfonate. It was found that all studied ILs have good EWs to be utilized as electrolytes in different electrochemical applications pertaining to industry. Furthermore, it was found that the structure of ILs affected the EW and both the cation and anion have important effect on the reductive and oxidative limits, respectively. The reductive limits of the studied ILs were found to follow the sequence of [P14,666]+ > [N112,1O2]+ > [HMPyrr]+ > [BMPyrr]+ > [EMIm]+ > [MOEMMor]+ ∼[MOPMPip]+ > [S222]+ > [BMPy]+ ∼ [HPy]+∼ [HPPy]+. The oxidative limits were found to follow the sequence of [TFSI]- > [TPTP]- > [TfO]- > [DCA]- > [TFA]-.
Keywords:Ionic liquid;Electrochemical window;Cyclic voltammetry;Cut-off current;Glassy carbon macro-electrode;Ag/AgCl electrode
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