▎ 摘　　要

NOVELTY - Preparation of graphene, involves flash thermal treatment of graphite oxide under inert atmosphere at 700 degrees C or less to produce exfoliation, cooling the material to less than 90 degrees C, and heating the resulting material under inert atmosphere at a temperature higher than the flash thermal treatment temperature, at a heating rate between 1 degrees C/minute and 15 degrees C/minute. USE - Preparation of graphene (claimed) used for preparing mixtures with spinels and other fillers to prepare improved and more homogeneous materials used for storing energy (e.g. batteries, supercondensers). ADVANTAGE - The method enables preparation of graphene having excellent physicochemical properties, controlled residual oxygenated functional group portion (direct consequence of the final temperature selected in the treatment), controlled surface area, which relates also with its volume, high capacity to be dispersed in solvents, and excellent processability. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of the reactor used for flash thermal treatment of graphite oxide. Inlet (1) Preheated volume (2) Oven (3) Heater (5) Inlet valve (8)