We demonstrate a facile, scalable and tunable method to produce a composite material based on graphene multilayers and Fe 2 O 3, combining the good conductivity and 2D layered structure of the former and the lithium storage capacity of the latter. The composite was obtained directly from bulk graphite, exploiting the fast electrochemical intercalation of tetrachloroferrate (III) anions (FeCl 4−) and nitromethane molecules between the graphene sheets. Then, irradiation with microwaves triggered the simultaneous ...