Effect of oxidant on the structural, morphological and supercapacitive properties of nickel hydroxide nanoflakes electrode films

S. M. Pawar, A. I. Inamdar, K. V. Gurav, Y. Jo, H. Kim, J. H. Kim, Hyunsik Im

Research output: Contribution to journalArticlepeer-review

13 Scopus citations

Abstract

Nanostructured nickel hydroxide Ni(OH)2 electrode films were synthesized using a chemical bath deposition (CBD) method at 80 °C. The effect of an oxidizing agent potassium persulfate (K2S2O8) on the structural, morphological and supercapacitive properties of the Ni(OH)2 electrode has been investigated. The structural and morphological studies revealed that randomly oriented Ni(OH)2 nanoflakes are converted into vertically aligned dense Ni(OH)2·NiOOH nanoflakes after the addition of the K2S2O8 oxidant. The specific capacitance of the Ni(OH)2·NiOOH electrode is found to be ∼1257 F/g which is significantly larger than that of the Ni(OH)2 electrode (∼454 F/g). The oxidant-mediated Ni(OH)2·NiOOH electrode shows an improved capacitive retention. The significantly improved supercapacitor properties of the Ni(OH)2·NiOOH electrode are due to a combined effect of increased active area and enhanced electrical conductivity.

Original languageEnglish
Pages (from-to)336-339
Number of pages4
JournalMaterials Letters
Volume141
DOIs
StatePublished - 15 Feb 2015

Keywords

  • Chemical bath deposition
  • Nanostructured nickel hydroxide
  • Oxidant
  • Supercapacitor

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