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Supercapacitive performance of chemically synthesized polypyrrole thin films: effect of monomer to oxidant ratio

  • B. H. Patil
  • R. N. Bulakhe
  • C. D. Lokhande
Article

Abstract

Polypyrrole (PPY) thin films with different PPY monomer to ammonium peroxidisulphate (APS) oxidant molar ratios have been synthesized using simple and inexpensive chemical oxidative polymerization method. An interrelation between the monomer to oxidant molar ratio, morphology and supercapacitive performance of PPY thin films is studied. Initial polymerization conditions strongly affect the morphology and electrical properties of PPY thin films. Thermo-gravimetric and differential scanning calorimetric curves show the thermal stability of PPY up to 483 K. The supercapacitive performance of PPY films is studied using cyclic voltammetry, galvanostatic charge–discharge and electrochemical impedance spectroscopy techniques. In the present work, PPY films deposited with 0.1:0.2 monomer to oxidant molar ratio (pyrrole:APS) show maximum specific capacitance of 754 F g−1 in 1 M H2SO4 electrolyte at the scan rate 5 mV s−1 in potential window of −0.4 to +0.6 V/SCE.

Keywords

Galvanostatic Charge Oxidant Ratio Pyrrole Monomer Globular Particulate Supercapacitive Performance 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Acknowledgments

Authors are grateful to the University Grant Commission (UGC), New Delhi (INDIA) through DSA-I program and to Department of Science and Technology for financial supports through DST-PURSE scheme and FIST programs.

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Copyright information

© Springer Science+Business Media New York 2014

Authors and Affiliations

  1. 1.Thin Film Physics Laboratory, Department of PhysicsShivaji UniversityKolhapurIndia

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