Isosorbide-Derived Ionic Liquid Electrolytes for High-Performance Supercapacitors

• Isosorbide-derived ionic liquids show high ionic conductivity and wide electrochemical stability window. • Supercapacitors using these electrolytes achieve high specific capacitance and excellent cycling stability. • The green synthesis route offers a sustainable alternative to conventional electrolytes. • The study provides insights into the structure-property relationship for optimizing ionic liquid electrolytes.