Electrochemical storage properties of polyaniline-, poly(N-methylaniline)-, and poly(N-ethylaniline)-coated pencil graphite electrodes

Arslan A., HÜR E.

CHEMICAL PAPERS, cilt.68, sa.4, ss.504-515, 2014 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 68 Sayı: 4
  • Basım Tarihi: 2014
  • Doi Numarası: 10.2478/s11696-013-0475-9
  • Dergi Adı: CHEMICAL PAPERS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.504-515
  • Anahtar Kelimeler: conducting polymer, polyaniline, electropolymerization, energy storage, supercapacitor, SUPERCAPACITOR APPLICATION, COMPOSITE ELECTRODES, POLYMER ELECTROLYTE, ACTIVATED CARBON, MANGANESE OXIDE, CAPACITORS, POLYPYRROLE, DEPOSITION, DEVICES, SURFACE
  • Eskişehir Osmangazi Üniversitesi Adresli: Evet

Özet

Three types of conducting polymers, polyaniline (PANI), poly(N-methylaniline) (PNMA), poly(N-ethylaniline) (PNEA) were electrochemically deposited on pencil graphite electrode (PGE) surfaces characterized as electrode active materials for supercapacitor applications. The obtained films were electrochemically characterized using different electrochemical methods. Redox parameters, electro-active characteristics, and electrostability of the polymer films were investigated via cyclic voltammetry (CV). Doping types of the polymer films were determined by the Mott-Schottky method. Electrochemical capacitance properties of the polymer film coating PGE (PGE/PANI, PGE/PNMA, and PGE/PNEA) were investigated by the CV and potentiostatic electrochemical impedance spectroscopy (EIS) methods in a 0.1 M H2SO4 aqueous solution. Thus, capacitance values of the electrodes were calculated. Results show that PGE/PANI, PGE/PNMA, and PGE/PNEA exhibit maximum specific capacitances of 131.78 F g(-1) (a parts per thousand 436.50 mF cm(-2)), 38.00 F g(-1) (a parts per thousand 130.70 mF cm(-2)), and 16.50 F g(-1) (a parts per thousand 57.83 mF cm(-2)), respectively. Moreover, charge-discharge capacities of the electrodes are reported and the specific power (SP) and specific energy (SE) values of the electrodes as supercapacitor materials were calculated using repeating chronopotentiometry.