Journal
MATERIALS CHEMISTRY AND PHYSICS
Volume 123, Issue 1, Pages 331-336Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.matchemphys.2010.04.030
Keywords
Nanostructures; Precipitation; Ultrasonic techniques; Electrochemical properties
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Funding
- Hanwha RD Center
- BK21 project
- Ministry of Health and Welfare
- Korean Ministry of Education, Science and Technology [R33-2008-000-10147-0]
- National Research Foundation of Korea [R33-2008-000-10147-0] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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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. (C) 2010 Elsevier B.V. All rights reserved.
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