Manganese oxide films prepared by sol-gel process for supercapacitor application

Chung Kwei Lin, Kai Han Chuang, Chia Yen Lin, Chien Yie Tsay, Chin Yi Chen

研究成果: 雜誌貢獻文章同行評審

92 引文 斯高帕斯(Scopus)

摘要

In this study, manganese oxide electrodes with promising pseudo-capacitive behavior were prepared by sol-gel process using manganese acetate as the precursor. Effects of post-heat treatment on material characteristics and electrochemical properties were investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM), thermal analysis, synchrotron X-ray absorption spectroscopy (XAS), and cycling voltammetry (CV). Experimental results showed that manganese oxide films prepared by sol-gel technique exhibited Mn2O3 and Mn3O4 phases after heat treating at a temperature higher than 300 °C. Meanwhile, a porous manganese oxide coating was observed due to the burnout of organics. The specific capacitance of the manganese oxide electrodes was 53.2, 230.5, 185.6, and 189.9 F/g after heat treating at 250, 300, 350, and 400 °C, respectively. After three hundred charging-discharging cycles, the specific capacitance of the manganese oxide electrodes heat treated at 300 °C decreased to 78.6% of its maximum. Synchrotron XAS examination revealed that manganese oxide electrodes exhibited the same trend where the trivalent manganese was transited into tetravalent manganese after cyclic voltammetry tests.
原文英語
頁(從 - 到)1272-1276
頁數5
期刊Surface and Coatings Technology
202
發行號4-7
DOIs
出版狀態已發佈 - 12月 15 2007
對外發佈

ASJC Scopus subject areas

  • 表面、塗料和薄膜
  • 凝聚態物理學
  • 表面和介面

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