Improvement of Quasi-Solid-State Supercapacitors Based on “Water-in-Salt” Hydrogel Electrolyte by Introducing Redox-Active Ionic Liquid and Carbon Nanotubes

In comparison with supercapacitors (SCs) with aqueous solution electrolytes, quasi-solid-state SCs (QSCs) based on hydrogel electrolytes (HEs) exhibit more extensive application prospect due to the advantages for example easier encapsulation...