Application of ultrasonic irradiation in preparing conducting polymer as active materials for supercapacitor

The application of ultrasonic irradiation in preparing conducting polymer as active material for supercapacitor was studied. Symmetric supercapacitor was fabricated from poly(3,4-ethylenedioxythiphene) (PEDOT) with 1 M H2SO4 as supporting electrolyte. The PEDOT was prepared by chemical oxidization in aqueous media, where FeCl3 was oxidant and p-toluenesulfonic acid as dopant. Ultrasonic irradiation was introduced to enhance both chemical yield and specific capacitance of the material. The specific capacitance of PEDOT increased from 72 to 100 F/g by ultrasonic irradiation, which indicated that ultrasonic irradiation was an effective method to improve the performance of electrode materials for supercapacitor.