Two-Dimensional Unilamellar Cation-Deficient Metal Oxide Nanosheet Superlattices for High-Rate Sodium Ion Energy Storage.

Xiong, P; Zhang, X; Zhang, F; Yi, D; Zhang, J; Sun, B; Tian, H; Shanmukaraj, D; Rojo, T; Armand, M; Ma, R; Sasaki, T; Wang, G

Two-Dimensional Unilamellar Cation-Deficient Metal Oxide Nanosheet Superlattices for High-Rate Sodium Ion Energy Storage.

Xiong, P

Zhang, X Zhang, F

Yi, D Zhang, J

Sun, B

Tian, H

Shanmukaraj, D Rojo, T Armand, M Ma, R Sasaki, T Wang, G

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Publisher:: American Chemical Society
Publication Type:: Journal Article
Citation:: ACS Nano, 2018, 12, (12), pp. 12337-12346
Issue Date:: 2018-11-26

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Field	Value	Language
dc.contributor.author	Xiong, P https://orcid.org/0000-0001-9483-6535
dc.contributor.author	Zhang, X
dc.contributor.author	Zhang, F https://orcid.org/0000-0003-0548-0130
dc.contributor.author	Yi, D
dc.contributor.author	Zhang, J https://orcid.org/0000-0001-5476-0134
dc.contributor.author	Sun, B https://orcid.org/0000-0002-4365-486X
dc.contributor.author	Tian, H https://orcid.org/0000-0002-3622-129X
dc.contributor.author	Shanmukaraj, D
dc.contributor.author	Rojo, T
dc.contributor.author	Armand, M
dc.contributor.author	Ma, R
dc.contributor.author	Sasaki, T
dc.contributor.author	Wang, G https://orcid.org/0000-0003-4295-8578
dc.date.accessioned	2021-07-29T09:35:53Z
dc.date.available	2021-07-29T09:35:53Z
dc.date.issued	2018-11-26
dc.identifier.citation	ACS Nano, 2018, 12, (12), pp. 12337-12346
dc.identifier.issn	1936-0851
dc.identifier.issn	1936-086X
dc.identifier.uri	http://hdl.handle.net/10453/149985
dc.description.abstract	Cation-deficient two-dimensional (2D) materials, especially atomically thin nanosheets, are highly promising electrode materials for electrochemical energy storage that undergo metal ion insertion reactions, yet they have rarely been achieved thus far. Here, we report a Ti-deficient 2D unilamellar lepidocrocite-type titanium oxide (Ti0.87O2) nanosheet superlattice for sodium storage. The superlattice composed of alternately restacked defective Ti0.87O2 and nitrogen-doped graphene monolayers exhibits an outstanding capacity of ∼490 mA h g-1 at 0.1 A g-1, an ultralong cycle life of more than 10000 cycles with ∼0.00058% capacity decay per cycle, and especially superior low-temperature performance (100 mA h g-1 at 12.8 A g-1 and -5 °C), presenting the best reported performance to date. A reversible Na+ ion intercalation mechanism without phase and structural change is verified by first-principles calculations and kinetics analysis. These results herald a promising strategy to utilize defective 2D materials for advanced energy storage applications.
dc.format	Print-Electronic
dc.language	eng
dc.publisher	American Chemical Society
dc.relation	http://purl.org/au-research/grants/arc/DP160104340
dc.relation	http://purl.org/au-research/grants/arc/DP170100436
dc.relation.ispartof	ACS Nano
dc.relation.isbasedon	10.1021/acsnano.8b06206
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject.classification	Nanoscience & Nanotechnology
dc.title	Two-Dimensional Unilamellar Cation-Deficient Metal Oxide Nanosheet Superlattices for High-Rate Sodium Ion Energy Storage.
dc.type	Journal Article
utslib.citation.volume	12
utslib.location.activity	United States
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Faculty of Science
pubs.organisational-group	/University of Technology Sydney/Students
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	closed_access	*
pubs.consider-herdc	false
dc.date.updated	2021-07-29T09:35:50Z
pubs.issue	12
pubs.publication-status	Published
pubs.volume	12
utslib.citation.issue	12

Abstract:

Cation-deficient two-dimensional (2D) materials, especially atomically thin nanosheets, are highly promising electrode materials for electrochemical energy storage that undergo metal ion insertion reactions, yet they have rarely been achieved thus far. Here, we report a Ti-deficient 2D unilamellar lepidocrocite-type titanium oxide (Ti0.87O2) nanosheet superlattice for sodium storage. The superlattice composed of alternately restacked defective Ti0.87O2 and nitrogen-doped graphene monolayers exhibits an outstanding capacity of ∼490 mA h g-1 at 0.1 A g-1, an ultralong cycle life of more than 10000 cycles with ∼0.00058% capacity decay per cycle, and especially superior low-temperature performance (100 mA h g-1 at 12.8 A g-1 and -5 °C), presenting the best reported performance to date. A reversible Na+ ion intercalation mechanism without phase and structural change is verified by first-principles calculations and kinetics analysis. These results herald a promising strategy to utilize defective 2D materials for advanced energy storage applications.

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http://hdl.handle.net/10453/149985