Electrophoretically deposited manganese oxide coatings for supercapacitor application

Chin Yi Chen, Sheng Chang Wang, Chia Yen Lin, Fan Shiong Chen, Chung Kwei Lin

Research output: Contribution to journalArticlepeer-review

17 Citations (Scopus)

Abstract

In the present study, manganese oxide electrodes with promising pseudo-capacitive properties were prepared by electrophoretic deposition (EPD) using needle-like manganese dioxide powders. As-deposited coating exhibited a porous microstructure where the size and shape of the starting powders can be observed. The electrochemical performance of the as-deposited coating was then evaluated by cyclic voltammetry (CV) up to 300 times. The initial specific capacitance was 236 F/g which dropped to 200 F/g after 25 CV tests, and decreased gradually to 190 F/g thereafter. The electrochemical behaviors during EPD and CV were examined by synchrotron X-ray absorption spectroscopy techniques from which it was deciphered that a reduction reaction from Mn4+ to Mn3+ occurred during EPD concomitant with re-oxidization during repetitive CV cycles.

Original languageEnglish
Pages (from-to)3469-3474
Number of pages6
JournalCeramics International
Volume35
Issue number8
DOIs
Publication statusPublished - Dec 2009
Externally publishedYes

Keywords

  • A. Films
  • B. Spectroscopy
  • B. X-ray method
  • E. Capacitors

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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