Hydrothermal synthesis Of CuMnO2 for supercapacitor applications

Abstract

In our work, we prepared CuMnO2 through hydrothermal method. During this process, we changed NaOH concentration. These concentration were 3.4, 4.4 and 5.4g.The temperature during this process was set to 160◦C.The duration of this process was 24 hrs. Different types of characterization were done such as XRD, FESEM, EDX, UV, PL, FTIR, CV, GCD. Through XRD we confirmed the prepared sample was CuMnO2 . After confirmation we checked morphology of three samples and change in morphology with NaOH variation. Once again we confirmed if there was any impurity in samples through EDX. It also helped us to check Cu, Mn and O concentration ratio. FTIR was used to checked the bonds present in all three samples. These bonds matched with reference papers. Ultraviolet Spectroscopy (UV), Photoluminescence Spectroscopy (PL) were used to find its optical property. These samples showed optical property in visible light range. From UV band gaps were calculated for all three samples and increase in band gap was noticed with increasing NaOH concentration. CV and GCD were used to find specific capacitance of all three samples. The calculated specific capacitance from CV matched with specific capacitance from GCD. It was seen that the sample with 4.4g NaOH concentration had the highest specific capacitance. From this we understood that these samples are applicable for supercapacitor application.