Electrosynthesis of the CdMn2O4 Nanoplates as High Performance Supercapacitor by Controlled Current Density

The ever-growing demands for high capacity energy storage devices have prompted worldwide research community to develop an advanced high performance energy storage system. Supercapacitors, also known as electrochemical capacitors, have attracted much attention in recent years due to their significant potential for energy storage and electric vehicles. Several mixed transition metal oxides such as Fe3O4, Co3O4, NiO, Mn3O4, CuCo2O4, ZnMn2O4, CoMn2O4 etc., have been explored as electrode material for energy storage device. In this work, Cd-Mn binary oxide nanostructures have been prepared by cathodic electrodeposition of mixed Cd/Mn nitrate solutions. The electrodeposition step has been carried out galvanostatically at current density of 4 mAcm-2. The synthesized nanostructures were characterized by X-ray diffraction (XRD), Fourier Transform Infrared (FTIR) spectrometry and Scanning Electron Microscopy (SEM). The storage ability of the samples was investigated by cyclic voltammetry in 1M KOH aqueous solution at different scan rates ranging from 1 to 100 mVs-1. High capacitance of 210 Fg-¹ for the sample prepared can be achieved at the scanning rate of 1 mv/s. The proposed method provides a facile, cost effective and high performance strategy for the synthesis of CdMn2O4 for supercapacitor applications.