An electric double-layer capacitor (EDLC), also known as a supercapacitor, is an electrochemical capacitor with extremely high capacitance. EDLCs are used in applications requiring many rapid charge/discharge cycles rather than long-term energy storage.
Some of the emerging trends in electric double-layer capacitors (EDLCs) include the use of graphene and other 2D materials as the electrode material, the use of ionic liquids as the electrolyte, and the use of nanostructured materials as the separator.