Manganese oxide thin films prepared by potentiodynamic electrodeposition and their supercapacitor performance

Ming Tsung Lee, Jeng-Kuei Chang*, Yao Tsung Hsieh, Wen Ta Tsai, Chung Kwei Lin

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

16 Scopus citations

Abstract

Manganese oxide film for supercapacitor applications was prepared by potentiodynamic electrodeposition in a manganese acetate plating solution. The effects of the potential sweep rate on the oxide microstructure, crystallinity, and chemical states were examined using a scanning electron microscope, an X-ray diffractometer, and an X-ray photoelectron spectrometer, respectively. Electrochemical performance of the film electrodes was evaluated using a cyclic voltammetric measurement. The experimental results indicate that the deposition potential sweep rate significantly affected the material properties of the prepared oxide films. The oxide-specific capacitance increased from 262 to 337 F/g when the sweep rate was increased from 100 to 400 mV/s. The key material factors that govern the specific capacitance and cyclic stability of the oxide electrodes were discussed.

Original languageEnglish
Pages (from-to)1697-1703
Number of pages7
JournalJournal of Solid State Electrochemistry
Volume14
Issue number9
DOIs
StatePublished - 1 Sep 2010

Keywords

  • Manganese oxide
  • Potentiodynamic electrodeposition
  • Supercapacitor performance

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