Effect of synthesis temperature on the characteristics of hydrous manganese oxide deposited using the hydrothermal electrochemical method

Chih Hsiang Liang, Chii-Shyang Hwang

研究成果: Article同行評審

5 引文 斯高帕斯(Scopus)

摘要

Nanometer-scale manganese oxide films were synthesized at various temperatures in the range of 60-150°C using the hydrothermal electrochemical deposition method. Field-emission scanning electron microscopy (FE-SEM), X-ray photoelectron spectroscopy (XPS), and X-ray diffraction (XRD) were used to verify that the deposits were tri- and divalent hydrous manganese oxides. The electrochemical performance of manganese oxide films was examined by cyclic voltammetry (CV) in the range of 0.0-1.0 V [versus saturated calomel electrode (SCE)] in 0.1 M Na2SO4solution at 25 °C. The specific capacitance (SC) increased with decreasing synthesis temperature, with a maximum value of approximately 244F.g-1at 60 °C. Crystalline manganese oxide prepared at 150 °C improved stability of capacitive performance, which only decreased by 4% after 800 cycles. The SC depended not only on the surface morphology but also on the amount of hydration in the manganese oxide structure. The deposited manganese oxide has the chemical formula Mn3O4· nH2O (n - 1.2), as established using thermogravimetric and differential thermal analysis (TG/DTA).

原文English
頁(從 - 到)1662-1666
頁數5
期刊Japanese Journal of Applied Physics
47
發行號3 PART 1
DOIs
出版狀態Published - 2008 三月 14

All Science Journal Classification (ASJC) codes

  • 工程 (全部)
  • 物理與天文學 (全部)

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