Facile morphology-controlled synthesis of nanostructured MnMoO₄ nanorods as an advance electrode material for supercapacitor application

A facile microwave-assisted method has been successfully established for the preparation of manganese molybdate (MnMoO₄) materials. The surface morphologies of the MnMoO₄ specimens were altered by varying the duration of microwave irradiation, and various morpholologies such as rounded rectangular shaped nanosheets and ultra-small nanorod structures have been attained. The proposed use of MnMoO₄ as an active electrode material for supercapacitor application was evaluated by cyclic voltammetric and chronopotentiometric measurements. It is interesting to note that the observed specific capacitance of the MnMoO₄ electrode depends on its surface morphology. A unique one-dimensional MnMoO₄ demonstrated excellent electrochemical properties, which provide 836 Fg⁻¹ of specific capacitance at a scan rate of 5 mVs⁻¹ with an excellent cycling stability (84% of the initial specific capacitance retained after 3000 cycles). These outstanding electrochemical features of MnMoO₄ materials may be associated with their inherent properties such us small size, distinctive nanorod architecture and intriguing physicochemical properties. These results will render the MnMoO₄ materials as new and attractive active material for promising application in supercapacitors.