Supercapacitors: Superior Micro‐Supercapacitors Based on Graphene Quantum Dots (Adv. Funct. Mater. 33/2013)

A new application of graphene quantum dots (GQDs) as an ideal electrode material for supercapacitors is explored by X.-B. Yan and co-workers. On page 4111 they build a GQD//GQD symmetric micro-supercapacitor and a GQD//MnO2 asymmetric supercapacitor. Both devices show excellent rate capabilities, exceptionally high-frequency responses, and long-term cycle stability.