Lithium perchlorate doped plasticized chitosan and starch blend as biodegradable polymer electrolyte for supercapacitors

Y. N. Sudhakar, M. Selvakumar

Research output: Contribution to journalArticle

63 Citations (Scopus)

Abstract

Biodegradable polymer electrolyte comprising the blend of chitosan (CS) and starch, plasticized with glycerol, as host polymer and lithium perchlorate (LiClO 4) as a dopant is prepared by solution casting technique. The variation of conductivity has been investigated as a function of polymer blend ratio, plasticizer content, and LiClO 4 concentration at temperature range of 298-343 K using electrochemical impedance spectroscopy. The maximum conductivity is found to be 3.7 × 10 -4 S cm -1 at room temperature for 60:40 (CS/starch) concentration. The dielectric properties of the electrolyte film exhibit a long tail feature indicating good capacitance. The activation energy of all samples is evaluated using the Arrhenius plot and it is found to be 0.52-0.75 eV. The DSC thermogram peaks for CS-starch blends decreases with increase in the LiClO 4 content. A carbon-carbon supercapacitor is fabricated using suitable blend electrolyte ratio and its electrochemical characteristics are discussed at various temperatures and current density. This supercapacitor shows a fairly good specific capacitance of 133 Fg -1.

Original languageEnglish
Pages (from-to)398-405
Number of pages8
JournalElectrochimica Acta
Volume78
DOIs
Publication statusPublished - 01-09-2012

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Biodegradable polymers
Chitosan
Polymer blends
Starch
Electrolytes
Lithium
Capacitance
Carbon
Plasticizers
Arrhenius plots
Electrochemical impedance spectroscopy
Glycerol
Dielectric properties
Temperature
Polymers
Casting
Current density
Activation energy
Doping (additives)
Supercapacitor

All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)
  • Electrochemistry

Cite this

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abstract = "Biodegradable polymer electrolyte comprising the blend of chitosan (CS) and starch, plasticized with glycerol, as host polymer and lithium perchlorate (LiClO 4) as a dopant is prepared by solution casting technique. The variation of conductivity has been investigated as a function of polymer blend ratio, plasticizer content, and LiClO 4 concentration at temperature range of 298-343 K using electrochemical impedance spectroscopy. The maximum conductivity is found to be 3.7 × 10 -4 S cm -1 at room temperature for 60:40 (CS/starch) concentration. The dielectric properties of the electrolyte film exhibit a long tail feature indicating good capacitance. The activation energy of all samples is evaluated using the Arrhenius plot and it is found to be 0.52-0.75 eV. The DSC thermogram peaks for CS-starch blends decreases with increase in the LiClO 4 content. A carbon-carbon supercapacitor is fabricated using suitable blend electrolyte ratio and its electrochemical characteristics are discussed at various temperatures and current density. This supercapacitor shows a fairly good specific capacitance of 133 Fg -1.",
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Lithium perchlorate doped plasticized chitosan and starch blend as biodegradable polymer electrolyte for supercapacitors. / Sudhakar, Y. N.; Selvakumar, M.

In: Electrochimica Acta, Vol. 78, 01.09.2012, p. 398-405.

Research output: Contribution to journalArticle

TY - JOUR

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AU - Sudhakar, Y. N.

AU - Selvakumar, M.

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