Effects of Conductive Supports on the Growth and Capacitive Performance of Nanostructured Manganese Oxides

Abstract:

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The manganese oxide (MnO2) nanocrystals were formed on the surface of graphene oxides (GOs) and multi−walled carbon nanotubes (MWCNTs) through a facial hydrothermal route, respectively. It is found that the similar flower−like MnO2 nanocrystals covered on both conductive supports. Moreover, more dense and less size of MnO2 nanocrystals appeared on the surface of MWCNTs, whereas more perfect crystal structures for MnO2/GOs. Electrochemical measurements showed that both the nanocomposite electrodes exhibited nearly ideal capacitive behavior, and large capacitive value can be obtained for MnO2/GOs, while high stability for MnO2/MWCNTs. The high capacitance performance arises from the unique nanostructure of the nanocrystals, which facilitate the contact of the electrolyte and the active materials, and carbon−based materials provide an effective support for the formation of the nanocrystals and conductive pathway for the nanocomposite electrodes.

Info:

Periodical:

Advanced Materials Research (Volumes 306-307)

Edited by:

Shiquan Liu and Min Zuo

Pages:

1153-1156

DOI:

10.4028/www.scientific.net/AMR.306-307.1153

Citation:

N. Guo and Z. Y. Qin, "Effects of Conductive Supports on the Growth and Capacitive Performance of Nanostructured Manganese Oxides", Advanced Materials Research, Vols. 306-307, pp. 1153-1156, 2011

Online since:

August 2011

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$35.00

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