Shape-controlled synthesis of hierarchical hollow urchin-shape α-MnO2 nanostructures and their electrochemical properties

Jian Gan Wang; Ying Yang; Zheng Hong Huang; Feiyu Kang

doi:10.1016/j.matchemphys.2013.04.018

Shape-controlled synthesis of hierarchical hollow urchin-shape α-MnO₂ nanostructures and their electrochemical properties

Jian Gan Wang, Ying Yang, Zheng Hong Huang, Feiyu Kang

Tsinghua University

Research output: Contribution to journal › Article › peer-review

54 Scopus citations

Abstract

3D hierarchical hollow urchin-shape α-MnO₂ nanostructures have been synthesized using a simple one-step hydrothermal process in an acidic KMnO₄ solution without employing any templates or surfactants. The structure and morphology of the products were characterized by XRD, FTIR, SEM and TEM. The hierarchical hollow urchins were found to be assembled from single crystalline α-MnO₂ nanotubes. The formation mechanism of the unique superstructure was investigated systemically by varying the synthesis conditions. Electrochemical studies indicated that these α-MnO₂ nanotubes-assembled hollow urchins exhibited favorable performance compared to the α-MnO₂ nanorods-assembled microspheres as electrode materials in supercapacitor. Due to the distinct architecture of macroporous hollow structure and nanotubular building blocks, the sample delivered a specific capacitance of 123 F g^-1 with superior rate capability.

Original language	English
Pages (from-to)	643-650
Number of pages	8
Journal	Materials Chemistry and Physics
Volume	140
Issue number	2-3
DOIs	https://doi.org/10.1016/j.matchemphys.2013.04.018
State	Published - 15 Jul 2013
Externally published	Yes

Keywords

Crystal growth
Crystal structure
Electrochemical properties
Nanostructures

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10.1016/j.matchemphys.2013.04.018

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title = "Shape-controlled synthesis of hierarchical hollow urchin-shape α-MnO2 nanostructures and their electrochemical properties",

abstract = "3D hierarchical hollow urchin-shape α-MnO2 nanostructures have been synthesized using a simple one-step hydrothermal process in an acidic KMnO4 solution without employing any templates or surfactants. The structure and morphology of the products were characterized by XRD, FTIR, SEM and TEM. The hierarchical hollow urchins were found to be assembled from single crystalline α-MnO2 nanotubes. The formation mechanism of the unique superstructure was investigated systemically by varying the synthesis conditions. Electrochemical studies indicated that these α-MnO2 nanotubes-assembled hollow urchins exhibited favorable performance compared to the α-MnO2 nanorods-assembled microspheres as electrode materials in supercapacitor. Due to the distinct architecture of macroporous hollow structure and nanotubular building blocks, the sample delivered a specific capacitance of 123 F g-1 with superior rate capability.",

keywords = "Crystal growth, Crystal structure, Electrochemical properties, Nanostructures",

author = "Wang, {Jian Gan} and Ying Yang and Huang, {Zheng Hong} and Feiyu Kang",

year = "2013",

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doi = "10.1016/j.matchemphys.2013.04.018",

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TY - JOUR

T1 - Shape-controlled synthesis of hierarchical hollow urchin-shape α-MnO2 nanostructures and their electrochemical properties

AU - Wang, Jian Gan

AU - Yang, Ying

AU - Huang, Zheng Hong

AU - Kang, Feiyu

PY - 2013/7/15

Y1 - 2013/7/15

N2 - 3D hierarchical hollow urchin-shape α-MnO2 nanostructures have been synthesized using a simple one-step hydrothermal process in an acidic KMnO4 solution without employing any templates or surfactants. The structure and morphology of the products were characterized by XRD, FTIR, SEM and TEM. The hierarchical hollow urchins were found to be assembled from single crystalline α-MnO2 nanotubes. The formation mechanism of the unique superstructure was investigated systemically by varying the synthesis conditions. Electrochemical studies indicated that these α-MnO2 nanotubes-assembled hollow urchins exhibited favorable performance compared to the α-MnO2 nanorods-assembled microspheres as electrode materials in supercapacitor. Due to the distinct architecture of macroporous hollow structure and nanotubular building blocks, the sample delivered a specific capacitance of 123 F g-1 with superior rate capability.

AB - 3D hierarchical hollow urchin-shape α-MnO2 nanostructures have been synthesized using a simple one-step hydrothermal process in an acidic KMnO4 solution without employing any templates or surfactants. The structure and morphology of the products were characterized by XRD, FTIR, SEM and TEM. The hierarchical hollow urchins were found to be assembled from single crystalline α-MnO2 nanotubes. The formation mechanism of the unique superstructure was investigated systemically by varying the synthesis conditions. Electrochemical studies indicated that these α-MnO2 nanotubes-assembled hollow urchins exhibited favorable performance compared to the α-MnO2 nanorods-assembled microspheres as electrode materials in supercapacitor. Due to the distinct architecture of macroporous hollow structure and nanotubular building blocks, the sample delivered a specific capacitance of 123 F g-1 with superior rate capability.

KW - Crystal growth

KW - Crystal structure

KW - Electrochemical properties

KW - Nanostructures

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DO - 10.1016/j.matchemphys.2013.04.018

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JO - Materials Chemistry and Physics

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ER -

Shape-controlled synthesis of hierarchical hollow urchin-shape α-MnO₂ nanostructures and their electrochemical properties

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Keywords

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