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

研究成果: 雜誌貢獻文章同行評審

14 引文 斯高帕斯(Scopus)

摘要

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).
原文英語
頁(從 - 到)1234-1238
頁數5
期刊Thin Solid Films
517
發行號3
DOIs
出版狀態已發佈 - 12月 1 2008
對外發佈

ASJC Scopus subject areas

  • 電子、光磁材料
  • 材料化學
  • 金屬和合金
  • 表面、塗料和薄膜
  • 表面和介面

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