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Journal of Applied Electrochemistry

, Volume 43, Issue 1, pp 21–29 | Cite as

Ionic conductivity studies and dielectric studies of Poly(styrene sulphonic acid)/starch blend polymer electrolyte containing LiClO4

  • Y. N. Sudhakar
  • M. SelvakumarEmail author
Original Paper

Abstract

Proton and lithium-ion conducting biodegradable solid polymer electrolytes were prepared using blends of poly(styrene sulphonic acid) (PSSA) and starch for supercapacitor applications. The ionic conductivities have been calculated using the bulk impedance obtained through impedance spectroscopy with varying blend ratio and plasticizer. Glycerol as plasticizer improved the film formation property, while lithium perchlorate (LiClO4) as dopant enhanced the conductivity. The maximum conductivity has been found to be 5.7 × 10−3 Scm−1 at room temperature for 80/20 (PSSA/starch) blend ratio. The dielectric studies showed relaxation peaks indicating proton and Li+ conduction in the plasticized polymer blend matrix and dielectric modulus also exhibited a long tail feature indicating good capacitance. Differential scanning calorimetry thermograms showed two peaks and decreased with varying blend ratio and plasticizer. A carbon–carbon supercapacitor was fabricated using suitable electrolyte, and its electrochemical characteristics using cyclic voltammetry, AC impedance and galvanostatic charge–discharge were studied. Supercapacitor showed a fairly good specific capacitance of 115 Fg−1 at 10 mV s−1.

Keywords

Biodegradable polymer electrolyte Plasticizer Dielectric studies Supercapacitor 

Notes

Acknowledgments

Authors acknowledge with thanks the financial support received from the Defence and Research Development Organisation, Govt. of India, New Delhi.

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Copyright information

© Springer Science+Business Media Dordrecht 2012

Authors and Affiliations

  1. 1.Department of ChemistryManipal Institute of TechnologyManipalIndia

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