Microwave synthesized nanostructured TiO2-activated carbon composite electrodes for supercapacitor

M. Selvakumar, D. Krishna Bhat

Research output: Contribution to journalArticle

50 Citations (Scopus)

Abstract

Electrochemical properties of a supercapacitor based on nanocomposite electrodes of activated carbon with TiO2 nano particles synthesized by a microwave method have been determined. The TiO2/activated carbon nanocomposite electrode with a composition of 1:3 showed a specific capacitance 92 Fg-1. The specific capacitance of the electrode decreased with increase in titanium dioxide content. The p/p symmetrical supercapacitor fabricated with TiO2/activated carbon composite electrodes showed a specific capacitance of 122 Fg-1. The electrochemical behavior of the neat TiO2 nanoparticles has also been studied for comparison purpose. The galvanostatic charge-discharge test of the fabricated supercapacitor showed that the device has good coulombic efficiency and cycle life. The specific capacitance of the supercapacitor was stable up to 5000 cycles at current densities of 2, 4, 6 and 7 mA cm-2.

Original languageEnglish
Pages (from-to)236-241
Number of pages6
JournalApplied Surface Science
Volume263
DOIs
Publication statusPublished - 15-12-2012

All Science Journal Classification (ASJC) codes

  • Surfaces, Coatings and Films

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