Preparation Of Manganese Dioxide Material By Cyclic Voltammetry And Its Property Investigation

Electrochemical capacitors, as a new type of energy storage devices have widely applied inmany fields because of their high power density, high energy density and long lifecharacteristics. In order to meet the needs of the modern portable electronic devices, thedevelopment of a set of capacitors with ultra-thin, high energy storage, high-power, lightweight,and environmental protection properties has arose great interest in the synthesis of high energy,low cost, environmentally friendly materials as electrode materials for electrochemicalcapacitors.In this paper, on the basis of manganese dioxide preparation through CV technique withMnSO4and Na2SO4, the influence of scanning rate, circles and NiSO4on the obtainedmanganese dioxide was discussed. The morphology and structure of the products werecharacterized by scanning electron microscopy (SEM), charge-discharge curves. The capacitivebehavior of different method of manganese dioxide was compared.(1)On the basis of manganese dioxide preparation through CV technique with MnSO4andNa2SO4.The result showed that when MnSO432g/L,Na2SO412g/L;(2)Determing the optimum process conditions of manganese dioxide with the orthogonaltest.The result showed that scan rate at0.08V/s,the temperature at30℃, pH at6.5, the numberof cyclic at550;(3)Addition of NiSO4with1:15proportion promoted the production film with particle structureand increased its capacitance of172.2F/g.(4)low temperature liquid polymerization process and pyrolysis process are compaed, Theproducts were made up of particle structure with capacitor of126.3F/g,134.8F/g.Three methodof manganese dioxide was compared,The deposition method of manganese dioxide has highpower density, high energy density and long life characteristics.