Manganese dioxide/poly(5-formylindole)(MnO2/P5FIn)nanocomposites were prepared by a simple electrochemical method in two steps,supercapacitor based on composite material was assembled and its performance was tested.MnO2 is electrodeposited by applying a constant negative potential to the electrode,while P5FIn is electropolymerized by cyclic voltammetry.In order to obtain the MnO2/P5FIn electrode with the best electrochemical performance,the number of cyclic voltammetry cycles of P5FIn electropolymerization was optimized.The electrochemical test of the composite electrode was carried out in 0.2 mol·L-1 potassium chloride solution.The results showed that the maximum specific capacitance of the electrode can reach 4.31 mF·cm-2.The supercapacitor based on composite material is assembled with gel electrolyte.The maximum specific capacitance of the supercapacitor can reach 3.80 mF·cm-2,and the device has good cycle stability.This study has improved the energy storage capacity of MnO2 by a low-cost method,which provides a simple and feasible idea for the development of transition metal oxide-based supercapacitors.
维普
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