Mesoporous ITO/NiO with a core/shell structure for supercapacitors

Duc Tai Dam; Xin Wang; Jong-Min Lee

doi:10.1016/j.nanoen.2013.06.011

Mesoporous ITO/NiO with a core/shell structure for supercapacitors

Duc Tai Dam, Xin Wang, Jong-Min Lee

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

44 Citations (Scopus)

Abstract

In this study, a novel mesoporous NiO/ITO NW with a shell/core structure has been successfully synthesized by combining chemical vapor deposition (CVD) on titanium substrate and electrodeposition of H_I-e (hexagonal lyotropic) nickel hydroxide through a lyotropic liquid crystalline (LLC) template, followed by calcination in air at 270°C. The electrode material is characterized by X-ray diffraction (XRD), Raman spectroscopy, field emission scanning electron microscopy (FESEM) and transmission electron microscopy (TEM). Both cyclic voltammetry (CV) and chronopotentiometry demonstrate enhanced electrochemical properties of NiO/ITO NWs composite electrode and improved supercapacitive behaviors as compared to bulk mesoporous nickel oxide film. Maximum specific capacitance of 1025Fg^-1 at a discharge current density of 1Ag^-1 in the potential ranges from 0V to 0.5V is determined by galvanostatic charge-discharge measurement in 1M KOH solution. The newly synthesized heterostructure also possesses high capacitance retention ratio at high discharge current densities and long-term electrochemical stability in an alkaline solution. Therefore, this study provides a promising electrode engineering technique for various applications. © 2013 Elsevier Ltd.

Original language	English
Pages (from-to)	1303-1313
Journal	Nano Energy
Volume	2
Issue number	6
DOIs	https://doi.org/10.1016/j.nanoen.2013.06.011
Publication status	Published - Nov 2013
Externally published	Yes

Bibliographical note

Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].

Funding

This work is supported by Startup Grant of Nanyang Technological University and Academic Research Fund (RG21/09) of Ministry of Education in Singapore.

Research Keywords

Heterostructure
Porosity
Supercapacitor

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abstract = "In this study, a novel mesoporous NiO/ITO NW with a shell/core structure has been successfully synthesized by combining chemical vapor deposition (CVD) on titanium substrate and electrodeposition of HI-e (hexagonal lyotropic) nickel hydroxide through a lyotropic liquid crystalline (LLC) template, followed by calcination in air at 270°C. The electrode material is characterized by X-ray diffraction (XRD), Raman spectroscopy, field emission scanning electron microscopy (FESEM) and transmission electron microscopy (TEM). Both cyclic voltammetry (CV) and chronopotentiometry demonstrate enhanced electrochemical properties of NiO/ITO NWs composite electrode and improved supercapacitive behaviors as compared to bulk mesoporous nickel oxide film. Maximum specific capacitance of 1025Fg-1 at a discharge current density of 1Ag-1 in the potential ranges from 0V to 0.5V is determined by galvanostatic charge-discharge measurement in 1M KOH solution. The newly synthesized heterostructure also possesses high capacitance retention ratio at high discharge current densities and long-term electrochemical stability in an alkaline solution. Therefore, this study provides a promising electrode engineering technique for various applications. {\textcopyright} 2013 Elsevier Ltd.",

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AU - Wang, Xin

AU - Lee, Jong-Min

N1 - Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].

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N2 - In this study, a novel mesoporous NiO/ITO NW with a shell/core structure has been successfully synthesized by combining chemical vapor deposition (CVD) on titanium substrate and electrodeposition of HI-e (hexagonal lyotropic) nickel hydroxide through a lyotropic liquid crystalline (LLC) template, followed by calcination in air at 270°C. The electrode material is characterized by X-ray diffraction (XRD), Raman spectroscopy, field emission scanning electron microscopy (FESEM) and transmission electron microscopy (TEM). Both cyclic voltammetry (CV) and chronopotentiometry demonstrate enhanced electrochemical properties of NiO/ITO NWs composite electrode and improved supercapacitive behaviors as compared to bulk mesoporous nickel oxide film. Maximum specific capacitance of 1025Fg-1 at a discharge current density of 1Ag-1 in the potential ranges from 0V to 0.5V is determined by galvanostatic charge-discharge measurement in 1M KOH solution. The newly synthesized heterostructure also possesses high capacitance retention ratio at high discharge current densities and long-term electrochemical stability in an alkaline solution. Therefore, this study provides a promising electrode engineering technique for various applications. © 2013 Elsevier Ltd.

AB - In this study, a novel mesoporous NiO/ITO NW with a shell/core structure has been successfully synthesized by combining chemical vapor deposition (CVD) on titanium substrate and electrodeposition of HI-e (hexagonal lyotropic) nickel hydroxide through a lyotropic liquid crystalline (LLC) template, followed by calcination in air at 270°C. The electrode material is characterized by X-ray diffraction (XRD), Raman spectroscopy, field emission scanning electron microscopy (FESEM) and transmission electron microscopy (TEM). Both cyclic voltammetry (CV) and chronopotentiometry demonstrate enhanced electrochemical properties of NiO/ITO NWs composite electrode and improved supercapacitive behaviors as compared to bulk mesoporous nickel oxide film. Maximum specific capacitance of 1025Fg-1 at a discharge current density of 1Ag-1 in the potential ranges from 0V to 0.5V is determined by galvanostatic charge-discharge measurement in 1M KOH solution. The newly synthesized heterostructure also possesses high capacitance retention ratio at high discharge current densities and long-term electrochemical stability in an alkaline solution. Therefore, this study provides a promising electrode engineering technique for various applications. © 2013 Elsevier Ltd.

KW - Heterostructure

KW - Porosity

KW - Supercapacitor

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DO - 10.1016/j.nanoen.2013.06.011

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EP - 1313

JO - Nano Energy

JF - Nano Energy

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ER -

Mesoporous ITO/NiO with a core/shell structure for supercapacitors

Abstract

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