High supercapacitive stability of spray pyrolyzed ZnO-added manganese oxide coatings

Chin Yi Chen, Hung Wei Chang, Shao Ju Shih, Chien Yie Tsay, Chi Jung Chang, Chung Kwei Lin

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Zinc oxide (ZnO) has recently been reported to exhibit electrochemical supercapacitive properties. We demonstrate, for the first time, a nanocrystalline (3O4 phase with a nanocrystalline structure. ZnO may dissolve in manganese oxide and inhibit the grain growth of the manganese oxide. Cyclic voltammetry showed that the specific capacitance (SC) of the manganese oxide coating in 1 M Na2SO 4 electrolyte increased from 196 F/g to 230 F/g at 25 mV/s for 5 at% ZnO-added manganese oxide. After activation, the cycling efficiency of the composite electrode exhibited a high value of >90% for up to 1200 cycles for all the compositions.

Original languageEnglish
Pages (from-to)1885-1892
Number of pages8
JournalCeramics International
Volume39
Issue number2
DOIs
Publication statusPublished - Mar 2013

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Keywords

  • Electrophoretic deposition
  • Manganese oxide
  • Spray pyrolysis
  • Zinc oxide

ASJC Scopus subject areas

  • Ceramics and Composites
  • Process Chemistry and Technology
  • Electronic, Optical and Magnetic Materials
  • Surfaces, Coatings and Films
  • Materials Chemistry

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