Paper Title:
Structural and Electrochemical Study of Dandelion-Like Manganese Dioxide Synthesized by a New Microwave Hydrothermal Method
  Abstract

The microwave-hydrothermal method for synthesizing g-MnO2 has been investigated for the first time. The dandelion-like g-MnO2 active material with 1.0-5.0 μm in diameter was obtained from KBrO3 and MnSO4 via the novel method. Compared with traditional low-temperature hydrothermal method, this approach lowers the temperature by 30-40 °C, and shorts the reaction time 6-14 h. Electrochemical properties of dandelion-like γ-MnO2 were elucidated by cyclic voltammetry, galvanostatic charge-discharge and electrochemical impedance spectroscopy tests. The synthesized material shows a relative high specific capacitance, and the MnO2 obtained at the condition of 75 °C for 2 h shows the best electrochemical properties with a specific capacitance of 239.3 F·g-1 at the current density of 100 mA·g-1 in 6 M KOH electrolyte solution.

  Info
Periodical
Advanced Materials Research (Volumes 233-235)
Edited by
Zhong Cao, Lixian Sun, Xueqiang Cao, Yinghe He
Pages
1516-1519
DOI
10.4028/www.scientific.net/AMR.233-235.1516
Citation
J. L. Li, Y. T. Wang, Y. K. Zhang, G. M. Han, F. Gao, X. D. Wang, "Structural and Electrochemical Study of Dandelion-Like Manganese Dioxide Synthesized by a New Microwave Hydrothermal Method", Advanced Materials Research, Vols. 233-235, pp. 1516-1519, 2011
Online since
May 2011
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