Facile synthesis of MgO-carbon nanocomposites for advanced capacitive electrode materials

Abstract

The current study aims to develop a unique approach for constructing an asymmetric supercapacitor utilising a nanocomposite of MgO-Carbon as electrode material. The geometrical surface area of the MgO-Carbon has shown to be highly porous with different porosities, and the value is 210 m 2 g − 1 . This supercapacitor operates with an aqueous electrolyte consisting of 1M KOH. The ndings indicate that the test cell exhibited exceptional electrochemical output within the voltage range of 0 to 1 V. The capacitance of the MgO-Carbon cell is measured to be 225 F g − 1 at a current density of 2 A g − 1 .According to research on cycling, the aforementioned cell has demonstrated the ability to maintain 97% of its original capacitance following 20,000 cycles. The ndings of this study suggest that the MgO-Carbon holds promise as an electrode material for the development of environmentally friendly and costeffective energy storage devices. This composite exhibit excellent energy and power densities, along with a prolonged cycle life.