Martins, Vitor L.
Rennie, Anthony J. R.
Torresi, Roberto M.
Hall, Peter J.
Total Authors: 5
 Univ Sao Paulo, Inst Quim, BR-05513970 Sao Paulo - Brazil
 Univ Sheffield, Chem & Biol Engn, Sir Robert Hadfield Bldg, Sheffield S1 3JD, S Yorkshire - England
Total Affiliations: 2
Journal of the Electrochemical Society;
Web of Science Citations:
Electrodes in batteries and supercapacitors generally contain inert binders to maintain their structural integrity during operation but do not participate in the storage of energy. In this paper, we demonstrate that poly ionic liquids can function as structural binders while simultaneously improving the energy storage capability of supercapacitors. Specifically, we show that when the ionic liquid N-butyl-N-methyl pyrrolidinium bis(trifluoromethanesulfonyl) imide is used as electrolyte and poly(diallyldimethylammonium) bis(trifluoromethanesulfonyl) imide is employed as electrode binder the permissible operating voltage of the device is enhanced to 4.0 V. This results in a substantially increased overall specific energy (80% greater) and represents a step toward the development of devices with long cycle lives and high energy densities. (c) The Author(s) 2017. Published by ECS. All rights reserved. (AU)