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

Na Guo; Zong Yi Qin

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

Paper Titles

Photoluminescence Properties of InGaN/GaN Multiple Quantum Well Light Emitting Diodes by Metalorganic Chemical Vapor Deposition
p.1133

Heat Transfer Analysis of the Micron-Scale Agglomerates of TiO₂ Precursor during the Detonation Process
p.1138

Y₃Al₅O₁₂ Nanocrystallites Prepared from a Novel Crystalline Precursor
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Facile Synthesis of Cobalt Oxide Uniformly Coated on Multi-Wall Carbon Nanotubes for Supercapacitors
p.1148

Effects of Conductive Supports on the Growth and Capacitive Performance of Nanostructured Manganese Oxides
p.1153

Large-Sized TiO₂/SiO₂ Macroporous Materials for Photo-Degradation of Organic Compounds in Water and Air
p.1157

Synthesis and Characterization of Sol-Gel Derived Magnesium Tantalate Nanopowder
p.1162

Density Functional Theory Study of Influence of Hydrogen Absorption on the Field Emission Properties of Carbon Nanotubes
p.1166

Influence of Treatment of Hydrogen Plasma on Field Emission Properties of Carbon Nanotubes Films
p.1170

HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 306-307Effects of Conductive Supports on the Growth and...

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

Abstract:

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.