Advanced search
Start date
(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Ionic Liquids Containing Sulfonium Cations as Electrolytes for Electrochemical Double Layer Capacitors

Full text
Rennie, Anthony J. R. [1] ; Martins, Vitor L. [1, 2] ; Torresi, Roberto M. [2] ; Hall, Peter J. [1]
Total Authors: 4
[1] Univ Sheffield, Chem & Biol Engn, Sheffield S1 3JD, S Yorkshire - England
[2] Univ Sao Paulo, Inst Quim, BR-05513970 Sao Paulo, SP - Brazil
Total Affiliations: 2
Document type: Journal article
Source: Journal of Physical Chemistry C; v. 119, n. 42, p. 23865-23874, OCT 22 2015.
Web of Science Citations: 23

In this work, we report on the behavior of ionic liquids (ILs) containing sulfonium cations as electrolytes for electrochemical double layer capacitors (EDLCs). Physical properties such as viscosity and ionic conductivity are reported over a range of temperatures for ILs containing the diethylmethyl sulfonium {[}S-221], triethyl sulfonium {[}S-222], and diethylpropyl sulfonium {[}S-223] cations paired with the bis(trifluoromethanesulfonyl) imide {[}Tf2N] anion. The size and structure of the cations are shown to influence the physical and electrochemical properties of the ILs, with a significant degree of ionic coordination being evident in {[}S-223]{[}Tf2N]. The electrochemical behavior of these ILs in EDLCs was compared with that of a fairly established IL electrolyte, N-butyl-N-methylpyrrolidinium bis(trifluoromethanesulfonyl) imide ({[}Pyr(14)]{[}Tf2N]), and it is shown that {[}S-221]{[}Tf2N] can perform better in terms of energy and power at room temperature, despite operating at a much reduced potential. (AU)

FAPESP's process: 14/14690-1 - Development and improvement of electrochemical capacitors containing ionic liquids as electrolytes
Grantee:Vitor Leite Martins
Support type: Scholarships abroad - Research Internship - Post-doctor
FAPESP's process: 13/22748-7 - Development of High Performance Electrochemical Capacitors Based on Graphene and Ionic Liquids.
Grantee:Vitor Leite Martins
Support type: Scholarships in Brazil - Post-Doctorate
FAPESP's process: 09/53199-3 - Molecular recognition and energy storage: fundamental studies concerning geometry, size and synthesis effects on the optimization of the chemical properties of electroactive materials
Grantee:Roberto Manuel Torresi
Support type: Research Projects - Thematic Grants