High-Energy Supercapacitors based on Graphene Composites

Supercapacitors have attracted considerable attention due to their high power density and long cycle-life. Bridging batteries and conventional capacitors, supercapacitors can be used in portable electronics, power back-up, electrical vehicles, and various microdevices. However, the energy density of commercially available supercapacitors is relatively low (less than 10Wh kg-1); advanced supercapacitors must be developed with higher operating voltage and higher energy without sacrificing the...