A novel asymmetric pseudocapacitor based on poly(5,12-dihydrothieno [3′,4′:2,3][1,4]dioxocino[6,7-b]quinoxaline) coated graphite anode and poly(ethylenedioxythiophene) coated graphite cathode


GÜLLÜ M., YİĞİT D.

Synthetic Metals, vol.162, no.15-16, pp.1434-1442, 2012 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 162 Issue: 15-16
  • Publication Date: 2012
  • Doi Number: 10.1016/j.synthmet.2012.05.028
  • Title of Journal : Synthetic Metals
  • Page Numbers: pp.1434-1442
  • Keywords: Pseudocapacitors, Conducting polymers, Polymer based supercapacitor, REDOX SUPERCAPACITORS, ELECTRODE MATERIALS, RUTHENIUM OXIDE, POLYANILINE, PERFORMANCE, COMPOSITES

Abstract

We report here, the supercapacitive performance of a novel conducting polymer, namely, poly(5,12-dihydrothieno[3′,4′:2,3][1,4]dioxocino[6, 7-b]quinoxaline) (pTDQ), in an asymmetric n/p type pseudocapacitor cell. This novel polymer is coated on a graphite electrode and used in an asymmetric cell as a p-doped anode against poly(ethylenedioxythiophene) (pEDOT) coated graphite, an n-doped cathode. Supercapacitive performance of the asymmetric pseudocapacitor is evaluated by cyclic voltammetry (CV) and galvanostatic charge/discharge techniques in different supporting electrolyte-solvent systems. Performance tests show that this n/p type asymmetric pseudocapacitor has better supercapacitive performance; having the highest specific capacitance value of 213.7 F g -1 in the presence of 0.1 M tetrabutylammonium tetrafluoroborate (Bu 4NBF 4) as supporting electrolyte. Besides, specific energy value of the asymmetric pseudocapacitor is calculated as 31.7 Wh kg -1. AC impedance spectroscopy results strengthen the supercapacitance value of the asymmetric pseudocapacitor cell and indicate that the pseudocapacitor cell is more suitable for the low frequency range applications. © 2012 Elsevier B.V. All rights reserved.