Experimental Design of Preparing Morphologically Controllable MnO2 Thin Film Electrodes and Reserach of Their Properties
Manganese dioxide film electrodes were prepared on carbon cloth by cyclic voltammetry electrodeposition.The effect of electrodeposition scanning rate on the structure,morphology and electrochemical performance of the prepared electrode materials was investigated.Raman spectroscopy and scanning electron microscopy were used to characterize the structure and morphology of the materials.The supercapacitor properties of the electrode materials prepared at different scanning rates were compared through cyclic voltammetry and constant current charge discharge in 1 mol/L Na2 SO4 solution.It was found that manganese dioxide with different morphologies was controllable synthesized by adjusting the scanning rate of electrodeposition,and the sample prepared at the scanning rate of 40 mV/s shows the best electrochemical performance.Through the study of this experiment,it will make students know more about the frontier trends in the field of new energy development,and enable them to master the preparation process of new materials and advanced testing and characterization techniques.The experimental results can be used to verify theoretical knowledge they have learned which can significantly improve their practical ability and train the students to analyze and solve problems independently.
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