A hybrid of MnO2 nanowires and MWCNTs as cathode of excellent rate capability for supercapacitors

W. Tang; Y. Y. Hou; X. J. Wang; Y. Bai; Y. S. Zhu; H. Sun; Y. B. Yue; Y. P. Wu; K. Zhu; R. Holze

doi:10.1016/j.jpowsour.2011.09.050

A hybrid of MnO₂ nanowires and MWCNTs as cathode of excellent rate capability for supercapacitors

W. Tang, Y. Y. Hou, X. J. Wang, Y. Bai, Y. S. Zhu, H. Sun, Y. B. Yue, Y. P. Wu, K. Zhu, R. Holze

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

121 Scopus citations

Abstract

A hybrid of MnO₂-nanowires and MWCNTs to be used as cathode in a supercapacitor with good electrochemical performance was prepared by a facile hydrothermal method. In this hybrid the α-MnO₂ nanowires are well entangled with MWCNTs. The MWCNTs provide a network for fast electron transport whereas MnO₂ nanowires show a fast redox response. Since gain/loss of both electrons and ions can be realized very rapidly at the same time, the hybrid has an excellent rate capability and delivers an energy density of 17.8 Wh kg^-1 at 400 W kg^-1, which is maintained almost constant even at 3340 W kg^-1 in 0.5 M Li₂SO₄ aqueous electrolyte. The cycling behavior is very good even in the presence of oxygen. The data present great promise for the hybrid as a practical cathode material for aqueous supercapacitor.

Original language	English
Pages (from-to)	330-333
Number of pages	4
Journal	Journal of Power Sources
Volume	197
DOIs	https://doi.org/10.1016/j.jpowsour.2011.09.050
State	Published - 1 Jan 2012
Externally published	Yes

Keywords

Aqueous supercapacitor
Hybrid
MWCNTs
MnO
Nanowires
Rate capability

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1016/j.jpowsour.2011.09.050

Cite this

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title = "A hybrid of MnO2 nanowires and MWCNTs as cathode of excellent rate capability for supercapacitors",

abstract = "A hybrid of MnO2-nanowires and MWCNTs to be used as cathode in a supercapacitor with good electrochemical performance was prepared by a facile hydrothermal method. In this hybrid the α-MnO2 nanowires are well entangled with MWCNTs. The MWCNTs provide a network for fast electron transport whereas MnO2 nanowires show a fast redox response. Since gain/loss of both electrons and ions can be realized very rapidly at the same time, the hybrid has an excellent rate capability and delivers an energy density of 17.8 Wh kg-1 at 400 W kg-1, which is maintained almost constant even at 3340 W kg-1 in 0.5 M Li2SO4 aqueous electrolyte. The cycling behavior is very good even in the presence of oxygen. The data present great promise for the hybrid as a practical cathode material for aqueous supercapacitor.",

keywords = "Aqueous supercapacitor, Hybrid, MWCNTs, MnO, Nanowires, Rate capability",

author = "W. Tang and Hou, {Y. Y.} and Wang, {X. J.} and Y. Bai and Zhu, {Y. S.} and H. Sun and Yue, {Y. B.} and Wu, {Y. P.} and K. Zhu and R. Holze",

year = "2012",

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doi = "10.1016/j.jpowsour.2011.09.050",

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T1 - A hybrid of MnO2 nanowires and MWCNTs as cathode of excellent rate capability for supercapacitors

AU - Tang, W.

AU - Hou, Y. Y.

AU - Wang, X. J.

AU - Bai, Y.

AU - Zhu, Y. S.

AU - Sun, H.

AU - Yue, Y. B.

AU - Wu, Y. P.

AU - Zhu, K.

AU - Holze, R.

PY - 2012/1/1

Y1 - 2012/1/1

N2 - A hybrid of MnO2-nanowires and MWCNTs to be used as cathode in a supercapacitor with good electrochemical performance was prepared by a facile hydrothermal method. In this hybrid the α-MnO2 nanowires are well entangled with MWCNTs. The MWCNTs provide a network for fast electron transport whereas MnO2 nanowires show a fast redox response. Since gain/loss of both electrons and ions can be realized very rapidly at the same time, the hybrid has an excellent rate capability and delivers an energy density of 17.8 Wh kg-1 at 400 W kg-1, which is maintained almost constant even at 3340 W kg-1 in 0.5 M Li2SO4 aqueous electrolyte. The cycling behavior is very good even in the presence of oxygen. The data present great promise for the hybrid as a practical cathode material for aqueous supercapacitor.

AB - A hybrid of MnO2-nanowires and MWCNTs to be used as cathode in a supercapacitor with good electrochemical performance was prepared by a facile hydrothermal method. In this hybrid the α-MnO2 nanowires are well entangled with MWCNTs. The MWCNTs provide a network for fast electron transport whereas MnO2 nanowires show a fast redox response. Since gain/loss of both electrons and ions can be realized very rapidly at the same time, the hybrid has an excellent rate capability and delivers an energy density of 17.8 Wh kg-1 at 400 W kg-1, which is maintained almost constant even at 3340 W kg-1 in 0.5 M Li2SO4 aqueous electrolyte. The cycling behavior is very good even in the presence of oxygen. The data present great promise for the hybrid as a practical cathode material for aqueous supercapacitor.

KW - Aqueous supercapacitor

KW - Hybrid

KW - MWCNTs

KW - MnO

KW - Nanowires

KW - Rate capability

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DO - 10.1016/j.jpowsour.2011.09.050

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JO - Journal of Power Sources

JF - Journal of Power Sources

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