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Growth and characterization of carbon-supported MnO2 nanorods for supercapacitor electrode

✍ Scribed by Raj Kishore Sharma; Hyung-Suk Oh; Yong-Gun Shul; Hansung Kim

Publisher
Elsevier Science
Year
2008
Tongue
English
Weight
840 KB
Volume
403
Category
Article
ISSN
0921-4526

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✦ Synopsis

Preparation of carbon-supported nano-MnO 2 composite (MnO 2 /C) by microemulsion process is reported. As evidenced by highresolution transmission electron microscopy (HR-TEM) micrographs, highly dispersed MnO 2 nanorods over carbon surface with clear inter-phase boundaries are obtained. X-ray diffraction results of as grown composite powder confirm the aMnO 2 phase of manganese oxide that on annealing at elevated temperatures undergo oxidative transformation to Mn 3 O 4 and Mn 2 O 3 phases. The small size and high dispersion of MnO 2 nanorods in the composite material exhibited high capacitance of 165 Fg Γ€1 for MnO 2 /C and 458 Fg Γ€1 for pure MnO 2 .

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