Tween 80 Modified Graphene with Improved Processability for the Fabrication of Supercapacitors

M.N. Muralidharan, A. Seema*, Saj Mohan Mohandas Moolayil, K.R. Dayas, E.K. Sunny

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

8 Citations (Scopus)

Abstract

To improve processability, graphene was modified with Tween 80. The amount of binder required for making graphene electrodes was reduced to 4 wt% when modified with Tween 80 thus enhancing the processability for the fabrication of supercapacitors. The Tween 80 modification has considerably improved the surface area of graphene. Specific capacitance of 194.2 F/g for aqueous electrolyte and 92.06 F/g for organic electrolyte was obtained for these supercapacitors. Cyclic voltammetry of the supercapacitors with aqueous electrolyte exhibited excellent reversibility, close to ideal behavior, whereas organic electrolyte systems showed deviation at higher scan rates due to more internal resistance. The frequency response of the supercapacitors was studied using electrochemical impedance spectroscopy and found to have excellent electrochemical stability.
Original languageEnglish
Pages (from-to)1253-1259
JournalMaterials and manufacturing processes
Volume28
Issue number11
DOIs
Publication statusPublished - 2 Nov 2013
Externally publishedYes

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