**4. Conclusion**

Regarding graphene's amazing and unique properties, it is one of the best-known materials that may be applied for a variety of purposes. Graphene can be applied as electrode material in energy storage devices including rechargeable batteries and supercapacitors to store, absorb, and release large amounts of energy. Moreover, graphene-based metal oxides have the ability to increase the energy density, capacity, and performance of supercapacitors. Metal oxides have been considered one of the best electrode materials for supercapacitor application due to their affordable cost, easy synthesis, high capacity, environment friendly nature, and non-toxicity. However, conventional metal oxides have many disadvantages which limit their practical application including weak cyclic stability, low electrical conductivity, low power, and energy density. Graphene a 2D has the ability to solve these problems. Graphene can be combined with these metal oxides to make its composites to improve the performance of supercapacitors. Moreover, much attention has been focused in recent years on structural architecture, material production, and device performance assessment. To achieve the predicted full-scale actual use, the electrode materials' efficiency, as well as reproducible quantity, must be increased in the near future.

*Updates on Supercapacitors*
