Quasi solid-state electrolytes based on ionic liquid (IL) and ordered mesoporous matrix MCM-41 for supercapacitor application

Quasi solid-state electrolytes (QS-SEs) based on an ionic liquid ([EMIM][FSI]) immobilized in ordered mesoporous silica MCM-41 using physical imbibition process have been developed. Supercapacitor assembly obtained using activated carbon electrodes and QS-SEs can be operated up to 2 V and exhibit good specific capacitance of 30 F g(-1). The specific energy and power densities of the supercapacitor are found similar to 17 Wh kg(-1) and 1000 W kg(-1), respectively, at 1 mA cm(-2) current density and exhibit good cycle performance at room temperature.