Aqueous supercapacitors are appealing for high power applications because of the benefits of the aqueous electrolyte, such as high ionic conductivity, small solvated ion size, low cost, and low toxicity. The state-of-the-art material for supercapacitors is activated carbon due to its high surface area, high stability, and low cost. However, aqueous supercapacitors based on activated carbon electrodes suffer from their low electrode wettability due to the hydrophobicity of the electrode, which negatively affects its electrochemical performance. In this work, redox additives such as hydroquinone are added to the electrolytes to improve the electrode wettability of cylindrical aqueous supercapacitors. Moreover, redox additives could also provide additional capacitance by the redox reaction which further increase the electrochemical performance of the supercapacitors.