We have already underlined in this blog the discrepancy between the rapid evolution of the computational power and bit storage capabilities in computers, following Moore’s Law, and the quite stable energy storage density in batteries. It would be so necessary to develop batteries that charge and discharge fast, and able to store large density of energy.
UCLA researchers from the Department of Chemistry and Biochemistry, the Department of Materials Science and Engineering, and the California NanoSystems Institute demonstrated a high-performance graphene-based electrochemical super-capacitors that retain both properties: fast charge/discharge and high power density. They used LightScribe DVD optical drive to do the direct laser reduction of graphite oxide films to graphene, employed as electrodes in the device. The paper has been published in the journal Science:
M. F. El-Kady, V. Strong, S. Dubin, R. B. Kaner. Laser Scribing of High-Performance and Flexible Graphene-Based Electrochemical Capacitors. Science, 2012; 335 (6074): 1326 DOI: 10.1126/science.1216744