Investigating Supercapacitor Performance and Electrochemical Energy Storage Using New CuSn(OH)6 Nano-Cubes

Energy is the source of life obtained by exploiting various natural resources, including fossil fuels. Nowadays, one of the most important challenges in this field is the combination of production sources with electric energy storage systems. Supercapacitors have received a great deal of attention as a new technology for producing and storing electrical energy. In this research, a simple hydrothermal method was used to prepare bimetallic mixed hydroxide CuSn(OH)6 on a nickel foam substrate, and then the electrochemical behavior of the electrode was tested for use in electrochemical supercapacitors. Field emission scanning electron microscopy (FESEM) and transmission electron microscopy (TEM) were used to examine the morphology and structure of the synthesized electrodes. In addition, X-ray energy dispersive (EDX) and elemental mapping techniques were used to identify the composition and phase of the produced nanostructures. The electrochemical performance of modified electrodes in 2 M KOH electrolyte solution was investigated by several electrochemical methods including cyclic voltammetry (CV), galvanostatic charge-discharge (GCD), and electrochemical impedance spectroscopy (EIS). The electrode prepared in this study showed high specific capacity (2012.84 F g-1 at a current density of 1 A g-1) and excellent cycle stability (90.44% after 3000 cycles). Moreover, this supercapacitor electrode's maximum energy and power density were 140.88 Wh kg-1 and 29.16 kW kg-1, respectively.