Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1525064 | Materials Chemistry and Physics | 2010 | 6 Pages |
Abstract
Nanostructured manganese dioxide, MnO2, was synthesized by a sonochemical method. Nanostructured MnO2 had the shapes of flower-like and nanowires by changing the pH in the aqueous solution, as observed via scanning electron microscopy and transmission electron microscopy. The electrochemical capacitance was studied by cyclic voltammetry. A maximum specific capacitance of 300 Fg−1 was obtained for the nanowires in a potential range from 0.1 to 0.9 V vs. SCE in 1 M sodium sulfate solution at a scan rate of 5 mV s−1. These materials can be useful to increase the specific capacitance by wetting behavior of electrolytes from their structural properties.
Related Topics
Physical Sciences and Engineering
Materials Science
Electronic, Optical and Magnetic Materials
Authors
Ho-Seong Nam, Jae-Kook Yoon, Jang Myoun Ko, Jong-Duk Kim,