Porous MnO/Mn3O4 nanocomposites for electrochemical energy storage

Jinhua Yang; Xianfeng Yang; Yu Lin Zhong; Jackie Y. Ying

doi:10.1016/j.nanoen.2015.03.026

Porous MnO/Mn₃O₄ nanocomposites for electrochemical energy storage

Jinhua Yang, Xianfeng Yang, Yu Lin Zhong, Jackie Y. Ying^*

^*Corresponding author for this work

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

73 Scopus citations

Abstract

Controlling the morphology of nanostructured manganese oxide materials can be an effective way to improve capacitance for supercapacitor applications. Herein we demonstrated for the first time the synthesis of MnO/Mn₃O₄ nanocomposite tetrahedrons with a porous structure, and a new method to synthesize porous urchin-shaped MnO/Mn₃O₄ nanocomposite. Compared with the non-porous MnO nanocrystalline octahedrons and the mixture of non-porous MnO and Mn₃O₄, the porous MnO/Mn₃O₄ nanocomposite 'urchins' exhibited superior capacitance in supercapacitor application, while the porous MnO/Mn₃O₄ nanocomposite tetrahedrons displayed superior stability. The excellent capacitance and stability of these nanocomposites could be explained in terms of the much higher surface area associated with their porous structure. These porous nanostructures offered a good model to investigate the effects of morphology and surface area on the capacitance of nanocomposites.

Original language	English
Pages (from-to)	702-708
Number of pages	7
Journal	Nano Energy
Volume	13
DOIs	https://doi.org/10.1016/j.nanoen.2015.03.026
State	Published - 1 Apr 2015
Externally published	Yes

Bibliographical note

Publisher Copyright:
© 2015 Elsevier Ltd.

Keywords

Manganese oxide
Octahedron
Porous tetrahedron
Supercapacitor
Urchin-shaped

ASJC Scopus subject areas

Renewable Energy, Sustainability and the Environment
General Materials Science
Electrical and Electronic Engineering

Access to Document

10.1016/j.nanoen.2015.03.026

Cite this

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title = "Porous MnO/Mn3O4 nanocomposites for electrochemical energy storage",

abstract = "Controlling the morphology of nanostructured manganese oxide materials can be an effective way to improve capacitance for supercapacitor applications. Herein we demonstrated for the first time the synthesis of MnO/Mn3O4 nanocomposite tetrahedrons with a porous structure, and a new method to synthesize porous urchin-shaped MnO/Mn3O4 nanocomposite. Compared with the non-porous MnO nanocrystalline octahedrons and the mixture of non-porous MnO and Mn3O4, the porous MnO/Mn3O4 nanocomposite 'urchins' exhibited superior capacitance in supercapacitor application, while the porous MnO/Mn3O4 nanocomposite tetrahedrons displayed superior stability. The excellent capacitance and stability of these nanocomposites could be explained in terms of the much higher surface area associated with their porous structure. These porous nanostructures offered a good model to investigate the effects of morphology and surface area on the capacitance of nanocomposites.",

keywords = "Manganese oxide, Octahedron, Porous tetrahedron, Supercapacitor, Urchin-shaped",

author = "Jinhua Yang and Xianfeng Yang and Zhong, \{Yu Lin\} and Ying, \{Jackie Y.\}",

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year = "2015",

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T1 - Porous MnO/Mn3O4 nanocomposites for electrochemical energy storage

AU - Yang, Jinhua

AU - Yang, Xianfeng

AU - Zhong, Yu Lin

AU - Ying, Jackie Y.

PY - 2015/4/1

Y1 - 2015/4/1

N2 - Controlling the morphology of nanostructured manganese oxide materials can be an effective way to improve capacitance for supercapacitor applications. Herein we demonstrated for the first time the synthesis of MnO/Mn3O4 nanocomposite tetrahedrons with a porous structure, and a new method to synthesize porous urchin-shaped MnO/Mn3O4 nanocomposite. Compared with the non-porous MnO nanocrystalline octahedrons and the mixture of non-porous MnO and Mn3O4, the porous MnO/Mn3O4 nanocomposite 'urchins' exhibited superior capacitance in supercapacitor application, while the porous MnO/Mn3O4 nanocomposite tetrahedrons displayed superior stability. The excellent capacitance and stability of these nanocomposites could be explained in terms of the much higher surface area associated with their porous structure. These porous nanostructures offered a good model to investigate the effects of morphology and surface area on the capacitance of nanocomposites.

AB - Controlling the morphology of nanostructured manganese oxide materials can be an effective way to improve capacitance for supercapacitor applications. Herein we demonstrated for the first time the synthesis of MnO/Mn3O4 nanocomposite tetrahedrons with a porous structure, and a new method to synthesize porous urchin-shaped MnO/Mn3O4 nanocomposite. Compared with the non-porous MnO nanocrystalline octahedrons and the mixture of non-porous MnO and Mn3O4, the porous MnO/Mn3O4 nanocomposite 'urchins' exhibited superior capacitance in supercapacitor application, while the porous MnO/Mn3O4 nanocomposite tetrahedrons displayed superior stability. The excellent capacitance and stability of these nanocomposites could be explained in terms of the much higher surface area associated with their porous structure. These porous nanostructures offered a good model to investigate the effects of morphology and surface area on the capacitance of nanocomposites.

KW - Manganese oxide

KW - Octahedron

KW - Porous tetrahedron

KW - Supercapacitor

KW - Urchin-shaped

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