Preparation of Cu-MOF/Bi2WO6 Binary Composites by the Solvothermal Method: Its Characterization and Application as Supercapacitor Electrode Materials

In this research, the synthesis of a binary composite was conducted by combining Cu-MOF and Bi₂WO₆. The resulting composite, denoted as CuBW, was systematically prepared with varying weight percentages: CuBW20, CuBW50, and CuBW80. To assess the properties of the composites, multiple characterization techniques were employed, including FTIR, XRD, FESEM-Elemental Mapping, BET-BJH, TEM, HRTEM-SAED, and XPS. The composites were subjected to electrochemical testing utilizing a three-electrode system, with 3 M KOH serving as the electrolyte. Through the electrochemical study, various parameters were evaluated and subsequently compared to determine any differences or similarities among the different compositions. CuBW80 exhibits superior performance with a specific capacity of 1137 F g⁻¹, specific energy of 11 Wh kg⁻¹, and specific power of 4000 W kg⁻¹ at an operating current density of 0.5 A g⁻¹. In the cyclic stability test, CuBW80 demonstrated superior performance by retaining approximately 83% of its initial specific capacitance over 10000 cycles. This further highlights its resilience and durability, reinforcing its suitability for extended and reliable use in energy storage applications.