A general strategy for the in situ construction of CoSe<inf>2</inf>-MSe<inf>x</inf>@GA (M = Zn, Ni, and Fe) heterostructures for effective sodium storage

Xu, Z; Li, Y; Li, S; Chen, Y; Farahmandjou, M; Wang, G; Yang, H; Tian, H

A general strategy for the in situ construction of CoSe<inf>2</inf>-MSe<inf>x</inf>@GA (M = Zn, Ni, and Fe) heterostructures for effective sodium storage

Xu, Z Li, Y Li, S Chen, Y Farahmandjou, M Wang, G Yang, H Tian, H

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Publisher:: ROYAL SOC CHEMISTRY
Publication Type:: Journal Article
Citation:: Inorganic Chemistry Frontiers, 2024, 11, (22), pp. 8078-8092
Issue Date:: 2024-10-01

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Field	Value	Language
dc.contributor.author	Xu, Z
dc.contributor.author	Li, Y
dc.contributor.author	Li, S
dc.contributor.author	Chen, Y
dc.contributor.author	Farahmandjou, M
dc.contributor.author	Wang, G
dc.contributor.author	Yang, H
dc.contributor.author	Tian, H https://orcid.org/0000-0002-9581-0027
dc.date.accessioned	2025-01-30T06:39:02Z
dc.date.available	2025-01-30T06:39:02Z
dc.date.issued	2024-10-01
dc.identifier.citation	Inorganic Chemistry Frontiers, 2024, 11, (22), pp. 8078-8092
dc.identifier.issn	2052-1553
dc.identifier.issn	2052-1553
dc.identifier.uri	http://hdl.handle.net/10453/184677
dc.description.abstract	Effective strategies for constructing micro-/nanostructures with fast electrochemical reaction kinetics and excellent structural integrity can promote the practical application of metal selenide-based anode materials in sodium-ion batteries (SIBs). However, the precise control of their synthesis is still elusive. Herein, a facile and general precursor template strategy was developed for constructing three types of graphene aerogels (GAs) with in situ encapsulated bimetallic selenide (CoSe2-MSex@GA, M = Zn, Ni, and Fe) heterostructure materials. Rich heterogeneous interfaces, large graphene aerogel layer conductive networks and abundant porous structures engender more active sites, rapid reaction kinetics, enhanced electric/ionic conductivity and good structural stability in the prepared CoSe2-MSex@GA anodes, which thereby exhibit enhanced rate capabilities and cycling performances in SIBs. In particular, CoSe2-FeSe2@GA spherical heterostructure materials derived from Co-Fe PBA precursors exhibit a high capacity of 722.8 mA h g−1 at 1 A g−1 with 96.4% capacity retention after 1000 cycles. The kinetic analysis of the redox reaction showed that the CoSe2-MSex@GA electrodes were mainly dominated by pseudo-capacitive behaviors during the charging and discharging process. Besides, galvanostatic intermittent titration technique confirmed the rapid Na+ diffusion rate using the CoSe2-MSex@GA electrodes. This current scalable and simple preparation method for bimetallic selenide@GA heterostructures may be a promising strategy to provide more possibilities for the development of advanced electrode materials for sodium-ion batteries.
dc.language	English
dc.publisher	ROYAL SOC CHEMISTRY
dc.relation.ispartof	Inorganic Chemistry Frontiers
dc.relation.isbasedon	10.1039/d4qi01704h
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	0302 Inorganic Chemistry
dc.subject.classification	3402 Inorganic chemistry
dc.subject.classification	3403 Macromolecular and materials chemistry
dc.title	A general strategy for the in situ construction of CoSe<inf>2</inf>-MSe<inf>x</inf>@GA (M = Zn, Ni, and Fe) heterostructures for effective sodium storage
dc.type	Journal Article
utslib.citation.volume	11
utslib.for	0302 Inorganic Chemistry
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/UTS Groups
pubs.organisational-group	University of Technology Sydney/UTS Groups/Centre for Clean Energy Technology (CCET)
utslib.copyright.status	closed_access	*
dc.date.updated	2025-01-30T06:39:01Z
pubs.issue	22
pubs.publication-status	Published
pubs.volume	11
utslib.citation.issue	22

Abstract:

Effective strategies for constructing micro-/nanostructures with fast electrochemical reaction kinetics and excellent structural integrity can promote the practical application of metal selenide-based anode materials in sodium-ion batteries (SIBs). However, the precise control of their synthesis is still elusive. Herein, a facile and general precursor template strategy was developed for constructing three types of graphene aerogels (GAs) with in situ encapsulated bimetallic selenide (CoSe2-MSex@GA, M = Zn, Ni, and Fe) heterostructure materials. Rich heterogeneous interfaces, large graphene aerogel layer conductive networks and abundant porous structures engender more active sites, rapid reaction kinetics, enhanced electric/ionic conductivity and good structural stability in the prepared CoSe2-MSex@GA anodes, which thereby exhibit enhanced rate capabilities and cycling performances in SIBs. In particular, CoSe2-FeSe2@GA spherical heterostructure materials derived from Co-Fe PBA precursors exhibit a high capacity of 722.8 mA h g−1 at 1 A g−1 with 96.4% capacity retention after 1000 cycles. The kinetic analysis of the redox reaction showed that the CoSe2-MSex@GA electrodes were mainly dominated by pseudo-capacitive behaviors during the charging and discharging process. Besides, galvanostatic intermittent titration technique confirmed the rapid Na+ diffusion rate using the CoSe2-MSex@GA electrodes. This current scalable and simple preparation method for bimetallic selenide@GA heterostructures may be a promising strategy to provide more possibilities for the development of advanced electrode materials for sodium-ion batteries.

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