Preparation and characterization of a pseudocapacitor electrode by spraying a conducting polymer onto a flexible substrate
By Shaker A. Ebrahim and Mohamed E. Harb and Moataz M. Soliman and Mazhar B. Tayel
Published in Journal of Taibah University for Science
2016
Abstract
In this paper, polyaniline is deposited using a spraying technique onto a flexible current collector for pseudocapacitor applications. The polyaniline is characterized using Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), and optical absorption studies. The energy density of a pseudocapacitor is higher than that of double-layer supercapacitors due to Faradaic reactions. A high specific capacitance of 594.92 F/g is obtained at a scan rate of 5 mV/s with a scanning potential window of (?0.8 to 0.8 V). The results show an increase in the energy density of 82.63 W h/kg at a potential difference of 1 V using a 4 M potassium hydroxide aqueous electrolyte.