Laser Scribing of High-Performance and Flexible Graphene-Based Electrochemical Capacitors

Abstract

Infrared Route to Graphene Electrodes: Electrochemical capacitors can deliver large amounts of power quickly, but have limited energy storage because only the surface regions of electrodes can store charge. Graphene represents an alternative to activated carbon electrodes because of their high conductivity and surface area, but graphene sheets tend to reassociate and lose surface area. El-Kady et al. (p. 1326 ; see the Perspective by Miller ) show that graphite oxide sheets can be converted by infrared laser irradiation into porous graphene sheets that are flexible, robust, and highly conductive.