Effect of heat treatment on material characteristics and pseudo-capacitive properties of manganese oxide prepared by anodic deposition

Jeng Kuei Chang, Yi Lun Chen, Wen Ta Tsai

研究成果: Article同行評審

141 引文 斯高帕斯(Scopus)

摘要

Hydrous manganese oxide with amorphous structure is prepared by anodic deposition in manganese acetate solution. The effect of heat treatment (100-700°C) on the material characteristics of the oxides is investigated. The thermal property of the deposited oxide is examined by thermogravimetric and differential thermal analyses. Dehydration, organic-matter decomposition, oxidation and crystallization of the manganese oxide as a function of temperature are examined. Glancing angle X-ray diffraction, scanning electron microscope and X-ray photoelectron spectroscopy are carried out to explore, respectively, the crystal structure, surface morphology and chemical state of the oxide electrodes. It is found that the as-deposited manganese oxide, with an amorphous structure and fibrous feature, is further oxidized and tends to tangle with increasing annealing temperature (below 500°C). When the temperature uses above 500°C, the formation of crystalline oxide is confirmed. Cyclic voltammetry is also performed to evaluate the electrochemical performance of the oxide electrodes annealed at various temperatures. Excellent pseudo-capacitive behaviour of the oxide electrodes is revealed at a low annealing temperature (≤200°C). The cyclic stability of the deposited manganese oxide is significantly improved by introducing proper heat treatment.

原文English
頁(從 - 到)344-353
頁數10
期刊Journal of Power Sources
135
發行號1-2
DOIs
出版狀態Published - 2004 9月 3

All Science Journal Classification (ASJC) codes

  • 可再生能源、永續發展與環境
  • 能源工程與電力技術
  • 物理與理論化學
  • 電氣與電子工程

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