**5. Summary**

It was possible to synthesize the hybrid material as evidenced by the characterization techniques. Electrochemical analysis demonstrates the capacitive redox behavior of PANI, but graphene, which is a material with large surface area (the property that increases the capacitance) when combined with the polyaniline conducting polymer, acts as a good material for electrical conduction rather than good capacitive behavior. The introduction of the AuNp in the network further increases the electric conduction. The trapezoidal shape of the voltammetric curves indicates maximum peaks with a capacitance of 160 F/g. This quantity indicates that the current is delivered very fast, which is not convenient for a capacitor. These results conclude that it is not a very good material for energy storage; however, it has promising applications as conductive material such as electrodes for fuel cells. Good electrochemical properties were obtained for metal electrodes coated with the hybrid systems, suggesting good energy electrode applications.
