The need for progress in the development of energy supply devices such as batteries and large capacitors has led to the improvement and innovation of these devices so that they can store energy efficiently, and additionally they must be small, light, with low production costs, and friendly to the environment. For these reasons, in this investigation results of the characterization of physical and chemical behaviors of graphene-magnesium oxide and copper and magnesium oxide- copper systems are presented. The graphene was synthesized by means of the electrochemical exfoliation technique and deposited as a film on common glass via the spray technique, and over this film and Mn2O3 film was deposited by means of spin coating. The Raman results showed the presence of peaks D and G, located at 1534 and 1597 cm-1, respectively. XPS analysis demonstrated that the graphene is made up of three layers. TEM studies determined that the graphene is polycrystalline, and XRD established the magnesium oxide coatings' growth along the (222) and (440) planes of Mn2O3. The optical behavior indicated that the absorbance of graphene-Mn2O3 system decrease the energy gap in 0.8 eV with respect to Mn2O3 films. The voltage-current measurements suggest that the density current in the discharge process of the Mn2O3-Cu electrode system was improved approximately 3-fold with the graphene-Mn2O3-Cu electrode system. The obtained results allow concluding that addition of graphene to magnesium oxide coatings increases their electrochemical performance, so graphene-magnesium oxide could be used in energy storage devices.