Charging/discharging behavior of manganese oxide electrodes in aqueous electrolyte prepared by galvanostatic electrodeposition

Chih Hsiang Liang, Chiao Lin Nien, Hsien Chun Hu, Chii Shyang Hwang

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

Energy storage devices with high energy density have been used in many electronic devices in recently years. A supercapacitor is one such device, but lower energy density has limited its applications. In this study, manganese oxide deposited on a titanium substrate at various deposition temperatures using the galvanostatic electrodeposition method as the electrodes of a supercapacitor was investigated. The specific capacitance of a supercapacitor is depended on the deposition temperature and is affected by the surface morphology and roughness of the electrode surface. At a deposition temperature of 15°C, manganese oxide showed a needle-like appearance, a roughness of 60.0 nm, and a maximum specific capacitance of 225.3 Fg-1. The charging/discharging behavior of a supercapacitor was analyzed in 0.1 M Na 2SO4 aqueous electrolyte at various measuring temperatures and operating potential voltage ranges. The supercapacitor achieved a high energy density of 37.70 Whkg-1 in a 0.1 M Na2SO 4 electrolyte at 25°C in an operation range of 0 to 1.3 V.

Original languageEnglish
Pages (from-to)319-323
Number of pages5
JournalJournal of the Ceramic Society of Japan
Volume115
Issue number1341
DOIs
Publication statusPublished - 2007 May

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Chemistry(all)
  • Condensed Matter Physics
  • Materials Chemistry

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