Sponge-like graphene makes promising supercapacitor electrodes

While most of today's electric vehicles rely on batteries to store energy, supercapacitors have enjoyed significant improvements that have made them serious competitors to batteries. Batteries traditionally have the upper hand in terms of capacity, since supercapacitors' low capacities mean very short driving ranges for electric vehicles. Supercapacitors' biggest advantage lies in their much higher power density compared to batteries, enabling a quicker charge time and the ability to quickly discharge for fast acceleration.