Hierarchical al-doped and hydrogenated ZnO nanowire@MnO2 ultra-thin nanosheet core/shell arrays for high-performance supercapacitor electrode

Mingpeng Yu, Hongtao Sun, Xiang Sun, Fengyuan Lu, Gongkai Wang, Tao Hu, Hong Qiu, Jie Lian

Research output: Contribution to journalArticle

25 Citations (Scopus)

Abstract

ZnO@MnO2 and Al-doped ZnO (AZO)@MnO2 hybrid electrodes in core/shell geometries have been synthesized on stainless steel substrates by a scalable low-cost solution route. Cyclic voltammogram (CV) and galvanostatic (GV) charge-dischargemeasurements demonstrated that the AZO@MnO2 hybrid electrode exhibited superior capacitive properties, in 1M Na2SO4 aqueous solution, to the ZnO@MnO2 electrode. The specific capacitance based on total electrode mass is estimated to be 275 F/g at a current density of 2 A/g. The AZO@MnO2 electrode also displays an excellent long-term cyclic stability at a current density of 10 A/g with less than 3% loss after 2000 charge-discharge cycles. A ~35% capacity retention was observed at 60A/g, which is over 400% specific capacitance increment compared with the ZnO@MnO2 electrode. The superior electrochemical capacitive properties of the AZO@MnO2 over ZnO@MnO2 can be attributed to the enhanced electrical conductivity in the core nanowire, as a result of Al doping and hydrogenation. The low cost fabrication combined with the excellent capacitive properties indicates that the AZO@MnO2 hybrid architecture can serve as a promising electrode material for supercapacitors as well as other electrochemical energy storage/conversion devices.

Original languageEnglish (US)
Pages (from-to)2313-2329
Number of pages17
JournalInternational Journal of Electrochemical Science
Volume8
Issue number2
StatePublished - Feb 1 2013

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Nanosheets
Nanowires
Electrodes
Capacitance
Current density
Stainless Steel
Supercapacitor
Energy storage
Hydrogenation
Costs
Stainless steel
Doping (additives)
Fabrication
Geometry
Substrates

All Science Journal Classification (ASJC) codes

  • Electrochemistry

Cite this

Yu, Mingpeng ; Sun, Hongtao ; Sun, Xiang ; Lu, Fengyuan ; Wang, Gongkai ; Hu, Tao ; Qiu, Hong ; Lian, Jie. / Hierarchical al-doped and hydrogenated ZnO nanowire@MnO2 ultra-thin nanosheet core/shell arrays for high-performance supercapacitor electrode. In: International Journal of Electrochemical Science. 2013 ; Vol. 8, No. 2. pp. 2313-2329.
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abstract = "ZnO@MnO2 and Al-doped ZnO (AZO)@MnO2 hybrid electrodes in core/shell geometries have been synthesized on stainless steel substrates by a scalable low-cost solution route. Cyclic voltammogram (CV) and galvanostatic (GV) charge-dischargemeasurements demonstrated that the AZO@MnO2 hybrid electrode exhibited superior capacitive properties, in 1M Na2SO4 aqueous solution, to the ZnO@MnO2 electrode. The specific capacitance based on total electrode mass is estimated to be 275 F/g at a current density of 2 A/g. The AZO@MnO2 electrode also displays an excellent long-term cyclic stability at a current density of 10 A/g with less than 3{\%} loss after 2000 charge-discharge cycles. A ~35{\%} capacity retention was observed at 60A/g, which is over 400{\%} specific capacitance increment compared with the ZnO@MnO2 electrode. The superior electrochemical capacitive properties of the AZO@MnO2 over ZnO@MnO2 can be attributed to the enhanced electrical conductivity in the core nanowire, as a result of Al doping and hydrogenation. The low cost fabrication combined with the excellent capacitive properties indicates that the AZO@MnO2 hybrid architecture can serve as a promising electrode material for supercapacitors as well as other electrochemical energy storage/conversion devices.",
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Hierarchical al-doped and hydrogenated ZnO nanowire@MnO2 ultra-thin nanosheet core/shell arrays for high-performance supercapacitor electrode. / Yu, Mingpeng; Sun, Hongtao; Sun, Xiang; Lu, Fengyuan; Wang, Gongkai; Hu, Tao; Qiu, Hong; Lian, Jie.

In: International Journal of Electrochemical Science, Vol. 8, No. 2, 01.02.2013, p. 2313-2329.

Research output: Contribution to journalArticle

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T1 - Hierarchical al-doped and hydrogenated ZnO nanowire@MnO2 ultra-thin nanosheet core/shell arrays for high-performance supercapacitor electrode

AU - Yu, Mingpeng

AU - Sun, Hongtao

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AU - Lu, Fengyuan

AU - Wang, Gongkai

AU - Hu, Tao

AU - Qiu, Hong

AU - Lian, Jie

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N2 - ZnO@MnO2 and Al-doped ZnO (AZO)@MnO2 hybrid electrodes in core/shell geometries have been synthesized on stainless steel substrates by a scalable low-cost solution route. Cyclic voltammogram (CV) and galvanostatic (GV) charge-dischargemeasurements demonstrated that the AZO@MnO2 hybrid electrode exhibited superior capacitive properties, in 1M Na2SO4 aqueous solution, to the ZnO@MnO2 electrode. The specific capacitance based on total electrode mass is estimated to be 275 F/g at a current density of 2 A/g. The AZO@MnO2 electrode also displays an excellent long-term cyclic stability at a current density of 10 A/g with less than 3% loss after 2000 charge-discharge cycles. A ~35% capacity retention was observed at 60A/g, which is over 400% specific capacitance increment compared with the ZnO@MnO2 electrode. The superior electrochemical capacitive properties of the AZO@MnO2 over ZnO@MnO2 can be attributed to the enhanced electrical conductivity in the core nanowire, as a result of Al doping and hydrogenation. The low cost fabrication combined with the excellent capacitive properties indicates that the AZO@MnO2 hybrid architecture can serve as a promising electrode material for supercapacitors as well as other electrochemical energy storage/conversion devices.

AB - ZnO@MnO2 and Al-doped ZnO (AZO)@MnO2 hybrid electrodes in core/shell geometries have been synthesized on stainless steel substrates by a scalable low-cost solution route. Cyclic voltammogram (CV) and galvanostatic (GV) charge-dischargemeasurements demonstrated that the AZO@MnO2 hybrid electrode exhibited superior capacitive properties, in 1M Na2SO4 aqueous solution, to the ZnO@MnO2 electrode. The specific capacitance based on total electrode mass is estimated to be 275 F/g at a current density of 2 A/g. The AZO@MnO2 electrode also displays an excellent long-term cyclic stability at a current density of 10 A/g with less than 3% loss after 2000 charge-discharge cycles. A ~35% capacity retention was observed at 60A/g, which is over 400% specific capacitance increment compared with the ZnO@MnO2 electrode. The superior electrochemical capacitive properties of the AZO@MnO2 over ZnO@MnO2 can be attributed to the enhanced electrical conductivity in the core nanowire, as a result of Al doping and hydrogenation. The low cost fabrication combined with the excellent capacitive properties indicates that the AZO@MnO2 hybrid architecture can serve as a promising electrode material for supercapacitors as well as other electrochemical energy storage/conversion devices.

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