Dual modification of Ti<inf>3</inf>C<inf>2</inf>T<inf>x</inf> MXene hybridization and cut-off voltage adjustment for MoS<inf>2</inf> to achieve stable sodium storage performance

Li, J; Tang, S; Yuan, Q; Hao, J; Li, Z; Wang, T; Wang, C; Pan, L

Dual modification of Ti<inf>3</inf>C<inf>2</inf>T<inf>x</inf> MXene hybridization and cut-off voltage adjustment for MoS<inf>2</inf> to achieve stable sodium storage performance

Li, J Tang, S Yuan, Q Hao, J Li, Z Wang, T Wang, C Pan, L

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Publisher:: Royal Society of Chemistry (RSC)
Publication Type:: Journal Article
Citation:: Materials Chemistry Frontiers, 2023, 7, (5), pp. 917-928
Issue Date:: 2023-01-17

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Field	Value	Language
dc.contributor.author	Li, J
dc.contributor.author	Tang, S
dc.contributor.author	Yuan, Q
dc.contributor.author	Hao, J
dc.contributor.author	Li, Z
dc.contributor.author	Wang, T
dc.contributor.author	Wang, C
dc.contributor.author	Pan, L
dc.date.accessioned	2024-02-14T00:37:35Z
dc.date.available	2024-02-14T00:37:35Z
dc.date.issued	2023-01-17
dc.identifier.citation	Materials Chemistry Frontiers, 2023, 7, (5), pp. 917-928
dc.identifier.issn	2052-1537
dc.identifier.issn	2052-1537
dc.identifier.uri	http://hdl.handle.net/10453/175664
dc.description.abstract	Molybdenum disulfide (MoS2), a typical layered transition metal sulfide with a large interlayer distance, narrow band gap structure, and high theoretical capacity for sodium storage, shows tremendous promise for sodium-ion batteries (SIBs). Unfortunately, the inadequate cycling stability due to the mechanical failure caused by the deep conversion reaction upon cycling at low voltage, combined with its intrinsic poor electical conductivity, results in degraded electrochemical performance. In this work, a novel Ti3C2Tx MXene was introduced to fabricate a MoS2/Ti3C2Tx hybrid through a facile hydrothermal approach, dramatically increasing the reaction kinetics of the hybrid electrode. Additionally, further increasing the discharge cut-off voltage to 0.2 V, the target MoS2/Ti3C2Tx exhibits remarkable sodium storage performance in terms of specific capacity, cyclability, and rate capability. Strikingly, the capacity hardly ever decays after 1000 cycles at 1.0 A g−1. Noteworthily, the impressive sodium storage performance of MoS2/Ti3C2Tx within 0.2-3.0 V originates from the effective avoidance of deep conversion reations below 0.2 V and improved electronic kinetics from the combination with Ti3C2Tx flakes. Moreover, ex situ phase characteriztion, kinetic study, and pseudocapacitive effect for charge storage were also investigated to reveal the origin of the improved electrochemical performance. Importantly, the modifications of both electrode structure and cut-off voltage provide an effective way to optimize the electrochemical redox of the target electrode.
dc.language	en
dc.publisher	Royal Society of Chemistry (RSC)
dc.relation	National Natural Science Foundation of China21978251
dc.relation.ispartof	Materials Chemistry Frontiers
dc.relation.isbasedon	10.1039/d2qm01248k
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject.classification	3403 Macromolecular and materials chemistry
dc.subject.classification	3406 Physical chemistry
dc.subject.classification	4016 Materials engineering
dc.title	Dual modification of Ti<inf>3</inf>C<inf>2</inf>T<inf>x</inf> MXene hybridization and cut-off voltage adjustment for MoS<inf>2</inf> to achieve stable sodium storage performance
dc.type	Journal Article
utslib.citation.volume	7
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
utslib.copyright.status	closed_access	*
dc.date.updated	2024-02-14T00:37:34Z
pubs.issue	5
pubs.publication-status	Published
pubs.volume	7
utslib.citation.issue	5

Abstract:

Molybdenum disulfide (MoS2), a typical layered transition metal sulfide with a large interlayer distance, narrow band gap structure, and high theoretical capacity for sodium storage, shows tremendous promise for sodium-ion batteries (SIBs). Unfortunately, the inadequate cycling stability due to the mechanical failure caused by the deep conversion reaction upon cycling at low voltage, combined with its intrinsic poor electical conductivity, results in degraded electrochemical performance. In this work, a novel Ti3C2Tx MXene was introduced to fabricate a MoS2/Ti3C2Tx hybrid through a facile hydrothermal approach, dramatically increasing the reaction kinetics of the hybrid electrode. Additionally, further increasing the discharge cut-off voltage to 0.2 V, the target MoS2/Ti3C2Tx exhibits remarkable sodium storage performance in terms of specific capacity, cyclability, and rate capability. Strikingly, the capacity hardly ever decays after 1000 cycles at 1.0 A g−1. Noteworthily, the impressive sodium storage performance of MoS2/Ti3C2Tx within 0.2-3.0 V originates from the effective avoidance of deep conversion reations below 0.2 V and improved electronic kinetics from the combination with Ti3C2Tx flakes. Moreover, ex situ phase characteriztion, kinetic study, and pseudocapacitive effect for charge storage were also investigated to reveal the origin of the improved electrochemical performance. Importantly, the modifications of both electrode structure and cut-off voltage provide an effective way to optimize the electrochemical redox of the target electrode.

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http://hdl.handle.net/10453/175664