Electro-Polymerization Process with Double-Sided Electrodes for Supercapacitors

Supercapacitors are known for longer cycle life and faster charging rate compared to batteries. However, the energy density of supercapacitors requires improvement to expand their application space. To raise the energy density of redox supercapacitors, this work demonstrates electro-polymerization on both sides of electrodes to increase material loading, reduce overall device mass, and consequently increase the capacitance, power, and energy density of supercapacitors. We achieved an energy density of 1823 mWh kg
^-1
and a power density of 16.5 W kg
^-1
with a wide potential window of 3 V.