Supercapacitor's energy density is maximized when the pore size of the carbon material matches the size of the ions within the supercapacitor electrolyte. Because of the narrow pore size distribution of our electrode materials combined with a high surface area, we can offer high-performance materials optimized for different electrolyte system of interest. In addition, SupercapU can be produced with high bulk density (around 0.7 g/cc in electrode sheet form), enhancing device energy density. SupercapU is also available in high purity (<0.5% ash) for good cyclability.