Facile synthesis of α-MnO2 with a 3D staghorn coral-like micro-structure assembled by nano-rods and its application in electrochemical supercapacitors

From National Research Council Canada

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DOIResolve DOI: https://doi.org/10.3390/app7050511
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  1. National Research Council Canada. Energy, Mining and Environment
FormatText
TypeArticle
Journal titleApplied Sciences
ISSN2076-3417
2076-3417
Volume7
Issue5
Article number511
Subjectnanostructured alpha-MnO2; shape controlled synthesis; electrochemical supercapacitor
Abstract
Manganese oxides with an alpha crystal structure are synthesized via combined solid-state reaction and wet chemical processing, which is a simple and inexpensive synthetic route easy for mass production. The effects of the synthetic reaction duration and the temperature of acid treatments on crystal structure, morphology, and electrochemical capacitive properties of α-MnO2 are discussed. It is evidenced that the samples treated in acid for a longer time at 25 °C display the uniform nanorods that are aggregated to form micro-buildings with fine features on the surface of rods. This microstructure possesses large surface areas and more active sites that are easy to access electrochemically, leading to a better electrochemical capacitive performance. We expected that these results would provide the practical information for shape- and morphology-controlled synthesis for nanostructured functional materials in supercapacitor applications.
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PublisherMDPI
LanguageEnglish
Peer reviewedYes
NPARC number23002190
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Record created2017-08-31
Record modified2020-03-16
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