Nucleophilic Substitution Enables MXene Maximum Capacitance and Improved Stability

Xu, J; Longchamps, RS; Wang, X; Hu, B; Li, X; Wang, S; Li, L; Gu, Y; Cao, X; Yuan, N; Ge, S; Wang, G; Ding, J

Nucleophilic Substitution Enables MXene Maximum Capacitance and Improved Stability

Xu, J Longchamps, RS Wang, X Hu, B Li, X Wang, S

Li, L Gu, Y Cao, X Yuan, N Ge, S Wang, G

Ding, J

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Publisher:: WILEY-V C H VERLAG GMBH
Publication Type:: Journal Article
Citation:: Advanced Functional Materials, 2024, 34, (52)
Issue Date:: 2024-12-23

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Field	Value	Language
dc.contributor.author	Xu, J
dc.contributor.author	Longchamps, RS
dc.contributor.author	Wang, X
dc.contributor.author	Hu, B
dc.contributor.author	Li, X
dc.contributor.author	Wang, S https://orcid.org/0009-0000-0519-4842
dc.contributor.author	Li, L
dc.contributor.author	Gu, Y
dc.contributor.author	Cao, X
dc.contributor.author	Yuan, N
dc.contributor.author	Ge, S
dc.contributor.author	Wang, G https://orcid.org/0000-0003-4295-8578
dc.contributor.author	Ding, J
dc.date.accessioned	2025-02-02T23:34:47Z
dc.date.available	2025-02-02T23:34:47Z
dc.date.issued	2024-12-23
dc.identifier.citation	Advanced Functional Materials, 2024, 34, (52)
dc.identifier.issn	1616-301X
dc.identifier.issn	1616-3028
dc.identifier.uri	http://hdl.handle.net/10453/184798
dc.description.abstract	Combining the merits of battery and supercapacitor into a single device represents a major scientific and technological challenge. From a design perspective, electrode material plays a key role in the device and the fundamental difficulty lies in incorporating a high density of active sites into a stable material with excellent charge transfer kinetics. Here, the synthesis is reported of a nearly full-oxygen-functionalized 2D conductive transition metal carbide (Ti3C2Oy) with ultrahigh density of Ti─O/═O redox-active sites by nucleophilic substitution and in situ oxidation under the presence of a proper electrophilic reagent (K+). The fabricated electrode delivered exceptionally high gravimetric and volumetric capacitance (1,082 F g−1 and 3,182 F cm−3 in a potential window of 0.85 V, approximating the theoretical capacity of many transition metal oxides), fast charging/discharging in tens of seconds across a wide range of temperature (−70 to 60 °C), and excellent structural and chemical stability. These promising results provide avenues for the development of high-energy, high-power storage devices as well as electromagnetic shielding, and electronic and optoelectronic devices.
dc.language	English
dc.publisher	WILEY-V C H VERLAG GMBH
dc.relation.ispartof	Advanced Functional Materials
dc.relation.isbasedon	10.1002/adfm.202408892
dc.rights	info:eu-repo/semantics/openAccess
dc.subject	02 Physical Sciences, 03 Chemical Sciences, 09 Engineering
dc.subject.classification	Materials
dc.subject.classification	34 Chemical sciences
dc.subject.classification	40 Engineering
dc.subject.classification	51 Physical sciences
dc.title	Nucleophilic Substitution Enables MXene Maximum Capacitance and Improved Stability
dc.type	Journal Article
utslib.citation.volume	34
utslib.for	02 Physical Sciences
utslib.for	03 Chemical Sciences
utslib.for	09 Engineering
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	open_access	*
dc.rights.license	This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0). To view a copy of this license, visit https://creativecommons.org/licenses/by/4.0/
dc.date.updated	2025-02-02T23:34:45Z
pubs.issue	52
pubs.publication-status	Published
pubs.volume	34
utslib.citation.issue	52

Abstract:

Combining the merits of battery and supercapacitor into a single device represents a major scientific and technological challenge. From a design perspective, electrode material plays a key role in the device and the fundamental difficulty lies in incorporating a high density of active sites into a stable material with excellent charge transfer kinetics. Here, the synthesis is reported of a nearly full-oxygen-functionalized 2D conductive transition metal carbide (Ti3C2Oy) with ultrahigh density of Ti─O/═O redox-active sites by nucleophilic substitution and in situ oxidation under the presence of a proper electrophilic reagent (K+). The fabricated electrode delivered exceptionally high gravimetric and volumetric capacitance (1,082 F g−1 and 3,182 F cm−3 in a potential window of 0.85 V, approximating the theoretical capacity of many transition metal oxides), fast charging/discharging in tens of seconds across a wide range of temperature (−70 to 60 °C), and excellent structural and chemical stability. These promising results provide avenues for the development of high-energy, high-power storage devices as well as electromagnetic shielding, and electronic and optoelectronic devices.

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http://hdl.handle.net/10453/184798