Nanoengineering of NiO/MnO2/GO Ternary Composite for Use in High-Energy Storage Asymmetric Supercapacitor and Oxygen Evolution Reaction (OER).

Arshad, N; Usman, M; Adnan, M; Ahsan, MT; Rehman, MR; Javed, S; Ali, Z; Akram, MA; Demopoulos, GP; Mahmood, A

Nanoengineering of NiO/MnO2/GO Ternary Composite for Use in High-Energy Storage Asymmetric Supercapacitor and Oxygen Evolution Reaction (OER).

Arshad, N Usman, M Adnan, M Ahsan, MT Rehman, MR Javed, S Ali, Z Akram, MA Demopoulos, GP Mahmood, A

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Publisher:: MDPI
Publication Type:: Journal Article
Citation:: Nanomaterials (Basel), 2023, 13, (1), pp. 99
Issue Date:: 2023

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Field	Value	Language
dc.contributor.author	Arshad, N
dc.contributor.author	Usman, M
dc.contributor.author	Adnan, M
dc.contributor.author	Ahsan, MT
dc.contributor.author	Rehman, MR
dc.contributor.author	Javed, S
dc.contributor.author	Ali, Z
dc.contributor.author	Akram, MA
dc.contributor.author	Demopoulos, GP
dc.contributor.author	Mahmood, A https://orcid.org/0000-0001-6438-438X
dc.date.accessioned	2024-03-25T04:10:51Z
dc.date.available	2022-12-19
dc.date.available	2024-03-25T04:10:51Z
dc.date.issued	2023
dc.identifier.citation	Nanomaterials (Basel), 2023, 13, (1), pp. 99
dc.identifier.issn	2079-4991
dc.identifier.issn	2079-4991
dc.identifier.uri	http://hdl.handle.net/10453/177090
dc.description.abstract	Designing multifunctional nanomaterials for high performing electrochemical energy conversion and storage devices has been very challenging. A number of strategies have been reported to introduce multifunctionality in electrode/catalyst materials including alloying, doping, nanostructuring, compositing, etc. Here, we report the fabrication of a reduced graphene oxide (rGO)-based ternary composite NiO/MnO2/rGO (NMGO) having a range of active sites for enhanced electrochemical activity. The resultant sandwich structure consisted of a mesoporous backbone with NiO and MnO2 nanoparticles encapsulated between successive rGO layers, having different active sites in the form of Ni-, Mn-, and C-based species. The modified structure exhibited high conductivity owing to the presence of rGO, excellent charge storage capacity of 402 F·g-1 at a current density of 1 A·g-1, and stability with a capacitance retention of ~93% after 14,000 cycles. Moreover, the NMGO//MWCNT asymmetric device, assembled with NMGO and multi-wall carbon nanotubes (MWCNTs) as positive and negative electrodes, respectively, exhibited good energy density (28 Wh·kg-1), excellent power density (750 W·kg-1), and capacitance retention (88%) after 6000 cycles. To evaluate the multifunctionality of the modified nanostructure, the NMGO was also tested for its oxygen evolution reaction (OER) activity. The NMGO delivered a current density of 10 mA·cm-2 at the potential of 1.59 V versus RHE. These results clearly demonstrate high activity of the modified electrode with strong future potential.
dc.format	Electronic
dc.language	eng
dc.publisher	MDPI
dc.relation.ispartof	Nanomaterials (Basel)
dc.relation.isbasedon	10.3390/nano13010099
dc.rights	info:eu-repo/semantics/openAccess
dc.subject	0912 Materials Engineering, 1007 Nanotechnology
dc.subject.classification	4016 Materials engineering
dc.subject.classification	4018 Nanotechnology
dc.title	Nanoengineering of NiO/MnO2/GO Ternary Composite for Use in High-Energy Storage Asymmetric Supercapacitor and Oxygen Evolution Reaction (OER).
dc.type	Journal Article
utslib.citation.volume	13
utslib.location.activity	Switzerland
utslib.for	0912 Materials Engineering
utslib.for	1007 Nanotechnology
pubs.organisational-group	University of Technology Sydney
pubs.organisational-group	University of Technology Sydney/Faculty of Science
pubs.organisational-group	University of Technology Sydney/Faculty of Science/School of Mathematical and Physical Sciences
pubs.organisational-group	University of Technology Sydney/Strength - CCET - Centre for Clean Energy Technology
utslib.copyright.status	open_access	*
pubs.consider-herdc	false
dc.date.updated	2024-03-25T04:10:49Z
pubs.issue	1
pubs.publication-status	Published online
pubs.volume	13
utslib.citation.issue	1

Abstract:

Designing multifunctional nanomaterials for high performing electrochemical energy conversion and storage devices has been very challenging. A number of strategies have been reported to introduce multifunctionality in electrode/catalyst materials including alloying, doping, nanostructuring, compositing, etc. Here, we report the fabrication of a reduced graphene oxide (rGO)-based ternary composite NiO/MnO2/rGO (NMGO) having a range of active sites for enhanced electrochemical activity. The resultant sandwich structure consisted of a mesoporous backbone with NiO and MnO2 nanoparticles encapsulated between successive rGO layers, having different active sites in the form of Ni-, Mn-, and C-based species. The modified structure exhibited high conductivity owing to the presence of rGO, excellent charge storage capacity of 402 F·g-1 at a current density of 1 A·g-1, and stability with a capacitance retention of ~93% after 14,000 cycles. Moreover, the NMGO//MWCNT asymmetric device, assembled with NMGO and multi-wall carbon nanotubes (MWCNTs) as positive and negative electrodes, respectively, exhibited good energy density (28 Wh·kg-1), excellent power density (750 W·kg-1), and capacitance retention (88%) after 6000 cycles. To evaluate the multifunctionality of the modified nanostructure, the NMGO was also tested for its oxygen evolution reaction (OER) activity. The NMGO delivered a current density of 10 mA·cm-2 at the potential of 1.59 V versus RHE. These results clearly demonstrate high activity of the modified electrode with strong future potential.

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http://hdl.handle.net/10453/177090