Architecting Amorphous Vanadium Oxide/MXene Nanohybrid via Tunable Anodic Oxidation for High-Performance Sodium-Ion Batteries

Zhang, W; Peng, J; Hua, W; Liu, Y; Wang, J; Liang, Y; Lai, W; Jiang, Y; Huang, Y; Zhang, W; Yang, H; Yang, Y; Li, L; Liu, Z; Wang, L; Chou, SL

Architecting Amorphous Vanadium Oxide/MXene Nanohybrid via Tunable Anodic Oxidation for High-Performance Sodium-Ion Batteries

Zhang, W Peng, J Hua, W Liu, Y Wang, J Liang, Y Lai, W

Jiang, Y Huang, Y Zhang, W Yang, H Yang, Y Li, L Liu, Z Wang, L Chou, SL

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Publisher:: WILEY-V C H VERLAG GMBH
Publication Type:: Journal Article
Citation:: Advanced Energy Materials, 2021, 11, (22)
Issue Date:: 2021-06-01

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Field	Value	Language
dc.contributor.author	Zhang, W
dc.contributor.author	Peng, J
dc.contributor.author	Hua, W
dc.contributor.author	Liu, Y
dc.contributor.author	Wang, J
dc.contributor.author	Liang, Y
dc.contributor.author	Lai, W https://orcid.org/0000-0002-8685-9662
dc.contributor.author	Jiang, Y
dc.contributor.author	Huang, Y
dc.contributor.author	Zhang, W
dc.contributor.author	Yang, H
dc.contributor.author	Yang, Y
dc.contributor.author	Li, L
dc.contributor.author	Liu, Z
dc.contributor.author	Wang, L
dc.contributor.author	Chou, SL
dc.date.accessioned	2022-01-28T18:03:16Z
dc.date.available	2022-01-28T18:03:16Z
dc.date.issued	2021-06-01
dc.identifier.citation	Advanced Energy Materials, 2021, 11, (22)
dc.identifier.issn	1614-6832
dc.identifier.issn	1614-6840
dc.identifier.uri	http://hdl.handle.net/10453/153770
dc.description.abstract	Structural engineering and creating atomic disorder in electrodes are promising strategies for highly efficient and rapid charge storage in advanced batteries. Herein, a nanohybrid architecture is presented with amorphous vanadium oxide conformally coated on layered V2C MXene (a-VOx/V2C) via tunable anodic oxidation, which exhibits a high reversible capacity of 307 mAh g–1 at 50 mA g–1, decent rate capability with capacity up to 96 mAh g–1 at 2000 mA g–1, and good cycling stability as a cathode for sodium-ion batteries. The a-VOx layer enables reversible and fast Na+ insertion/extraction by providing sufficient vacancies and open pathways in the amorphous framework, unlike the irreversible phase transition in its crystalline counterpart, while layered V2C MXene offers abundant electron/ion transfer channels, which are joined together to boost the electrochemical performance. Notably the improved reversibility and structural superiority of the a-VOx/V2C nanohybrid are clearly revealed by in situ Raman, in situ transmission electron microscopy, in situ synchrotron X-ray absorption spectroscopy, and density functional theory calculations, demonstrating a reversible V–O vibration and valence oscillation between V4+ and V5+ in the disordered framework, with robust structural stability and unobstructed Na+ diffusion. This work provides a meaningful reference for the elaborate design of MXene-based nanostructured electrodes toward advanced rechargeable batteries.
dc.language	English
dc.publisher	WILEY-V C H VERLAG GMBH
dc.relation.ispartof	Advanced Energy Materials
dc.relation.isbasedon	10.1002/aenm.202100757
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	0303 Macromolecular and Materials Chemistry, 0912 Materials Engineering, 0915 Interdisciplinary Engineering
dc.title	Architecting Amorphous Vanadium Oxide/MXene Nanohybrid via Tunable Anodic Oxidation for High-Performance Sodium-Ion Batteries
dc.type	Journal Article
utslib.citation.volume	11
utslib.for	0303 Macromolecular and Materials Chemistry
utslib.for	0912 Materials Engineering
utslib.for	0915 Interdisciplinary 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
utslib.copyright.status	closed_access	*
dc.date.updated	2022-01-28T18:03:14Z
pubs.issue	22
pubs.publication-status	Published
pubs.volume	11
utslib.citation.issue	22

Abstract:

Structural engineering and creating atomic disorder in electrodes are promising strategies for highly efficient and rapid charge storage in advanced batteries. Herein, a nanohybrid architecture is presented with amorphous vanadium oxide conformally coated on layered V2C MXene (a-VOx/V2C) via tunable anodic oxidation, which exhibits a high reversible capacity of 307 mAh g–1 at 50 mA g–1, decent rate capability with capacity up to 96 mAh g–1 at 2000 mA g–1, and good cycling stability as a cathode for sodium-ion batteries. The a-VOx layer enables reversible and fast Na+ insertion/extraction by providing sufficient vacancies and open pathways in the amorphous framework, unlike the irreversible phase transition in its crystalline counterpart, while layered V2C MXene offers abundant electron/ion transfer channels, which are joined together to boost the electrochemical performance. Notably the improved reversibility and structural superiority of the a-VOx/V2C nanohybrid are clearly revealed by in situ Raman, in situ transmission electron microscopy, in situ synchrotron X-ray absorption spectroscopy, and density functional theory calculations, demonstrating a reversible V–O vibration and valence oscillation between V4+ and V5+ in the disordered framework, with robust structural stability and unobstructed Na+ diffusion. This work provides a meaningful reference for the elaborate design of MXene-based nanostructured electrodes toward advanced rechargeable batteries.

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