Enhancement electrochemical properties of supercapacitors using hybrid CuO/Ag/rGO based nanoporous composite as electrode materials

Utilizing clean and renewable energy sources requires the development of effective, reliable, and reasonably priced electrodes for supercapacitors. Herein, a simple, cheap, and fast synthesis method was developed to synthesize CuO/Ag/RGO(S1) as electrode material for Supercapacitors. Also, the effect of adding different proportions of silica nanoparticles S2A (1CuO/1Ag/1RGO/0.5SiNp), S2B (1CuO/1Ag/1RGO/1SiNp), and S4 (1CuO/1Ag/1RGO/1.5 SiNp) on the electrochemical properties of the composite was also investigated. Among the four synthesized composites, composite S1, due to its porous structure, has better electrochemical parameters than the other three composites. Also, the correct combination of a metal base (CuO, Ag) and carbon base (Reduced graphene oxide) materials with the accurate synthesis method and the use of proper precursors (F127, Ag(NO3), Cu(NO3)2) made the S1 composite have an ideal electrochemical result(Specific capacitance: 936 F g-1, energy density: 130 Wh kg-1, power density: 500 W kg-1, cycle stability: 90% rate capability: 88%) Compared to the pure state of each of these materials and other similar hybrid compounds. The reason for such ideal electrochemical results, which distinguishes this project from other similar projects, is the synergistic effect of the combination of CuO, Ag, and RGO, along with the hierarchical porosity obtained in the correct synthesis method. In our opinion, CuO/Ag/RGO maybe a viable choice for electrocatalytic and energy storage applications that require distinct electrochemical performances.