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

Sudhakar, Y N and Selvakumar, M (2012) Ionic conductivity studies and dielectric studies of Poly(styrene sulphonic acid)/ starch blend polymer electrolyte containing LiClO4. Journal of Applied Electrochemistry, 42 (11). ISSN 0021-891X

[img] PDF
JAEC.pdf - Published Version
Restricted to Registered users only

Download (668kB) | Request a copy

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 9 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.

Item Type: Article
Uncontrolled Keywords: Biodegradable polymer electrolyte � Plasticizer � Dielectric studies � Supercapacitor
Subjects: Engineering > MIT Manipal > Chemistry
Depositing User: MIT Library
Date Deposited: 10 Jun 2013 11:17
Last Modified: 10 Jun 2013 11:17
URI: http://eprints.manipal.edu/id/eprint/136277

Actions (login required)

View Item View Item