(506g) Thermal Behavior of Emin Tfsi Ionic Liquide ( 1-Ethyl-3- methylimidazolium bis (trifluoromethylsulfonyl) Imide Confined in Nanoporous Activated Carbons | AIChE

Other Sites & Tools

Technical Groups

(506g) Thermal Behavior of Emin Tfsi Ionic Liquide ( 1-Ethyl-3- methylimidazolium bis (trifluoromethylsulfonyl) Imide Confined in Nanoporous Activated Carbons

Authors 

Sliwinska-Bartkowiak, M. - Presenter, A.Mickiewicz University
Rotnicki, K. Jr., Faculty of Physics, Adam Mickiewicz University, Poznan
Jazdzewska, M. Sr., Faculty of Physics, Adam Mickiewicz University, Poznan
Beguin, F., Institute of Chemistry and Technical Electrochemistry, Poznan University of Technology, Poland
We report the melting behavior of ionic liquid 1-Ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide (EMIM TFSI) confined in nanoporous carbons. The ionic liquids (ILs) are recently mentioned as promising substances in electrochemistry as electrolytes in supercapacitors. The high applicability of these systems results from their exceptionally fast charging/discharging time measured in few seconds. The investigation of melting behavior of applied ionic liquid is important for low temperature operation conditions for supercapacitors [1,2].

In this work, we presented the experimental studies of the melting behavior of EMIM TFSI confined in carbon micropores of about 2 nm pore size and also carbon mesopores of pore size of 4.6 nm. The methods of Dielectric Relaxation Spectroscopy (DRS) and Differential Scanning Calorimetry (DSC) in wide temperature ranges were applied. To investigate structural properties of the systems, temperature-controlled Wide-angle X-ray scattering (WAXS) and Neutron Diffraction (ND) methods were adopted. The results obtained from DSC and DRS indicate that the melting temperature of EMIM TFSI confined in carbon nanopores decrease relative to the bulk ionic liquid. Analysis of the structures and dielectric relaxation processes of the EMIM TFSI below their pore melting point indicates the different structure and slower dynamic of EMIM TFSI confined in pores relative to the bulk [3].

References

[1] T. Welton, Room-Temperature Ionic Liquids. Solvents for Synthesis and Catalysis,Chem. Rev. 99 (1999) 2071–2084

[2] A. Elbourne, S. McDonald, K., Endres, G. G.Warr, R. Atkin, Nanostructure of the Ionic Liquid – Graphite Stern Layer, ACS Nano 9 No. 7 (2015) 7608–7620

[3] K.Rotnicki, A.Beskrovnyi, M.Jazdzewska, M.Sliwinska-Bartkowiak, Melting ofEMIN TFSI ionic liquid confined in nanocarbons, Journal of Molecular Liquids, in press

Financial support for the NCN grant No UMO-2016/ 22/A/ST4/00092 is gratefully acknowledged

Topics 

Physical Properties

More Conference Links