Effect of different modes of electrodeposition on supercapacitive properties of MnO 2 thin films

D. P. Dubal, D. S. Dhawale, T. P. Gujar, C. D. Lokhande

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61 Citations (Scopus)

Abstract

In present investigation MnO 2 thin films have been prepared by potentiodynamic (PD), potentiostatic (PS) and galvanostatic (GS) modes of electrodeposition. The effects of different modes on structural, surface morphological and supercapacitive properties of MnO 2 thin films have been investigated. Formation of amorphous phase of MnO 2 by all three modes is confirmed from X-ray diffraction (XRD) patterns. Significant change in the surface morphologies of MnO 2 thin films due to different modes has been observed. The supercapacitive properties of MnO 2 thin films have been studied in 1 M Na 2 SO 4 electrolyte. The maximum supercapacitance obtained for potentiodynamic, potentiostatic and galvanostatic modes is 237, 196 and 184 F g -1 , respectively. Additionally charge-discharge and impedance of MnO 2 thin films have been investigated.

Original languageEnglish
Pages (from-to)3378-3382
Number of pages5
JournalApplied Surface Science
Volume257
Issue number8
DOIs
Publication statusPublished - 1 Feb 2011

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Keywords

  • Charge-discharge
  • Impedance spectroscopy
  • Modes of electrodeposition
  • Supercapacitor
  • Surface morphology

ASJC Scopus subject areas

  • Chemistry(all)
  • Condensed Matter Physics
  • Physics and Astronomy(all)
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films

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