Journal
MATERIALS LETTERS
Volume 64, Issue 16, Pages 1763-1765Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.matlet.2010.05.019
Keywords
Manganese dioxide; Porosity; Capacitance; Electronic materials
Funding
- National High Technology Research and Development Program of China [2007AA03Z248]
- National Natural Science Foundation of China [20971082]
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delta-MnO2 was synthesized by a facile low-temperature hydrothermal method with a mixed system of KMnO4 and CO(NH2)(2) at 90 degrees C for 24 h. The obtained product was characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and N-2 adsorption-desorption. Results showed that the as-synthesized product had a layered structure and a high specific surface area of 230 m(2) g(-1). Electrochemical characterization indicated that the prepared material exhibited an ideal capacitive behavior with the initial capacitance value of 265 F g(-1) in 1 mol L-1 Na2SO4 aqueous solution at a scan rate of 5 mV s(-1) and excellent cycling behavior. (C) 2010 Elsevier B.V. All rights reserved.
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