CO2 emissions from energy production represent one of the main causes of the greenhouse effect. Indeed, about 70% of the world’s energy production comes from the combustion of fossil sources, which are connected to global warming. To mitigate this trend, higher energy production from renewable sources is required. However, since those can’t guarantee continuous production, the energy needs to be stored and then distributed through power grids. Supercapacitors have been developed as a promising energy storage solution due to their high-power density and fast charge/discharge rates. However, they present low energy densities, which can be improved with the right choice of active materials.