Supercapacitive properties of spray pyrolyzed iron-added manganese oxide powders deposited by electrophoretic deposition technique

Sheng Chang Wang, Chin Yi Chen, Tzu Chin Chien, Pee Yew Lee, Chung Kwei Lin

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

Nanocrystalline iron-added manganese oxide powders were prepared by spray pyrolysis (SP) from manganese acetate and iron nitrate solutions at 400 °C. The as-obtained powders were subsequently deposited onto graphite substrates via an electrophoretic deposition technique (EPD). The as-prepared powders were examined by transmission electron microscopy (TEM) and X-ray diffractometry (XRD); the electrochemical properties of the coatings were further examined by cycling voltammetry (CV). Structural investigation by TEM and XRD revealed that the as-deposited coatings exhibited Mn3O4 phase with nanocrystalline structure. CV examinations showed that the iron addition significantly improved the electrochemical properties of the Mn-oxide powder coatings. The specific capacitance of as-deposited Mn-oxide coating was increased from 202 F/g to 232 F/g when 2 at.% of iron was added. Even after 1200 cycles of life test, the iron-added coatings exhibited higher cycling efficiency (~ 78% of the initial maximum capacitance) than that unadded one (~ 60% of its maximum value).

Original languageEnglish
Pages (from-to)1234-1238
Number of pages5
JournalThin Solid Films
Volume517
Issue number3
DOIs
Publication statusPublished - Dec 1 2008
Externally publishedYes

Fingerprint

Manganese oxide
manganese oxides
iron oxides
Powders
sprayers
Iron
coatings
iron
Coatings
cycles
Voltammetry
Electrochemical properties
Oxides
X ray diffraction analysis
Capacitance
capacitance
Transmission electron microscopy
nanostructure (characteristics)
Powder coatings
transmission electron microscopy

Keywords

  • Cyclic voltammetry
  • Cycling efficiency
  • Electrophoretic deposition
  • Iron
  • Manganese oxide
  • Spray pyrolysis
  • Supercapacitor

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Materials Chemistry
  • Metals and Alloys
  • Surfaces, Coatings and Films
  • Surfaces and Interfaces

Cite this

Supercapacitive properties of spray pyrolyzed iron-added manganese oxide powders deposited by electrophoretic deposition technique. / Wang, Sheng Chang; Chen, Chin Yi; Chien, Tzu Chin; Lee, Pee Yew; Lin, Chung Kwei.

In: Thin Solid Films, Vol. 517, No. 3, 01.12.2008, p. 1234-1238.

Research output: Contribution to journalArticle

Wang, Sheng Chang ; Chen, Chin Yi ; Chien, Tzu Chin ; Lee, Pee Yew ; Lin, Chung Kwei. / Supercapacitive properties of spray pyrolyzed iron-added manganese oxide powders deposited by electrophoretic deposition technique. In: Thin Solid Films. 2008 ; Vol. 517, No. 3. pp. 1234-1238.
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