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Appl. Sci. 2017, 7(5), 511; doi:10.3390/app7050511

Facile Synthesis of α-MnO2 with a 3D Staghorn Coral-like Micro-Structure Assembled by Nano-Rods and Its Application in Electrochemical Supercapacitors

1
National Research Council Canada, 4250 Wesbrook Mall, Vancouver, BC V6T 1W5, Canada
2
College of Science, Shanghai University, 99 Shangda Road, Shanghai 200444, China
3
State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China
*
Author to whom correspondence should be addressed.
Academic Editor: Jiazhao Wang
Received: 22 March 2017 / Revised: 20 April 2017 / Accepted: 11 May 2017 / Published: 13 May 2017
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Abstract

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. View Full-Text
Keywords: nanostructured alpha-MnO2; shape controlled synthesis; electrochemical supercapacitor nanostructured alpha-MnO2; shape controlled synthesis; electrochemical supercapacitor
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Bing, Y.; Zhang, L.; Mu, S.; Zhang, J. Facile Synthesis of α-MnO2 with a 3D Staghorn Coral-like Micro-Structure Assembled by Nano-Rods and Its Application in Electrochemical Supercapacitors. Appl. Sci. 2017, 7, 511.

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