Rapid and controllable synthesis of Mn_2O_3 nanorods via a sonochemical method for supercapacitor electrode application

摘要

Mn_2O_3 is a significant candidate for various applications. In the present work, the Mn_2O_3 nanorods have been successfully prepared through a facile sonochemical method with the aid of a cetyl trimethyl ammonium bromide (CTAB) template. Systematic analyses were done to confirmes the formation and morphological properties of the Mn_2O_3 materials. It exhibits superior supercapacitor behavior with an electric double layer capacitor-based charge storage mechanism. The freshly prepared Mn_2O_3 nanorods render the maximum specific capacitance of 647 Fg~(-1) at a scan rate of 5 mVs~(-1) ,whereas the galvanostatic charge/discharge studies offer the specific capacitance of 656 Fg~(-1) at a current density of 1 Ag~(-1). The Mn_2O_3 nanorods provide the maximum energy and power densities of 91.1 Wh Kg~(-1) and 1525 Wkg~(-1), respectively. In addition, the cyclic stability analysis exhibits only 12% initial capacitance degradation over 3000 CV cycles at a scan rate of 100 mVs~(-1). The hopeful outcomes demonstrate the significance of the Mn_2O_3 nanorods as electrode material for supercapacitor devices.