Electron Delocalization and Dissolution-Restraint in Vanadium Oxide Superlattices to Boost Electrochemical Performance of Aqueous Zinc-Ion Batteries

Li, W; Han, C; Gu, Q; Chou, SL; Wang, JZ; Liu, HK; Dou, SX

Electron Delocalization and Dissolution-Restraint in Vanadium Oxide Superlattices to Boost Electrochemical Performance of Aqueous Zinc-Ion Batteries

Li, W Han, C

Gu, Q Chou, SL Wang, JZ Liu, HK Dou, SX

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Publisher:: WILEY-V C H VERLAG GMBH
Publication Type:: Journal Article
Citation:: Advanced Energy Materials, 2020, 10, (48)
Issue Date:: 2020-12-01

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Field	Value	Language
dc.contributor.author	Li, W
dc.contributor.author	Han, C https://orcid.org/0000-0002-1132-2051
dc.contributor.author	Gu, Q
dc.contributor.author	Chou, SL
dc.contributor.author	Wang, JZ
dc.contributor.author	Liu, HK
dc.contributor.author	Dou, SX
dc.date.accessioned	2021-02-11T19:53:50Z
dc.date.available	2021-02-11T19:53:50Z
dc.date.issued	2020-12-01
dc.identifier.citation	Advanced Energy Materials, 2020, 10, (48)
dc.identifier.issn	1614-6832
dc.identifier.issn	1614-6840
dc.identifier.uri	http://hdl.handle.net/10453/146037
dc.description.abstract	© 2020 Wiley-VCH GmbH Aqueous zinc-ion batteries (ZIBs) have triggered a great deal of scientific research and become a promising alternative for large-scale energy storage applications, owing to the unique merits of high volumetric energy density, abundance of zinc resources, eco-friendliness, and safety. The pace of progress of ZIB development, however, is hindered by their poor reversibility and sluggish kinetics, derived from the dissolution of active materials in aqueous electrolytes and the strong electrostatic interactions between Zn2+ and the cathode lattice. Herein, a vanadium oxide (V2O5-x)/polyaniline (PANI-V) superlattice structure is demonstrated as a model of superlattice structural engineering to overcome these weaknesses. In this superlattice, the PANI layer not only plays the role of a spacer to expand the V2O5-x interlayer spacing but also serves as a conductive capacity contributor. Moreover, the PANI layer servers as structural stabilizer to restrain the dissolution of V2O5-x active materials in aqueous electrolytes. In addition, it introduces an interface effect to modulate the charge distribution of the V2O5-x monolayer, promoting Zn-ion diffusion into the structure. Correspondingly, weakening the electrostatic interactions and supressing the active materials dissolution synergistically boosts the electrochemical performance for Zn-ion storage. This work paves the way for the development/improvement of cathodes for aqueous zinc-ion batteries.
dc.language	English
dc.publisher	WILEY-V C H VERLAG GMBH
dc.relation.ispartof	Advanced Energy Materials
dc.relation.isbasedon	10.1002/aenm.202001852
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	0303 Macromolecular and Materials Chemistry, 0912 Materials Engineering, 0915 Interdisciplinary Engineering
dc.title	Electron Delocalization and Dissolution-Restraint in Vanadium Oxide Superlattices to Boost Electrochemical Performance of Aqueous Zinc-Ion Batteries
dc.type	Journal Article
utslib.citation.volume	10
utslib.for	0303 Macromolecular and Materials Chemistry
utslib.for	0912 Materials Engineering
utslib.for	0915 Interdisciplinary Engineering
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Civil and Environmental Engineering
pubs.organisational-group	/University of Technology Sydney
utslib.copyright.status	closed_access	*
dc.date.updated	2021-02-11T19:53:35Z
pubs.issue	48
pubs.publication-status	Published
pubs.volume	10
utslib.citation.issue	48

Abstract:

© 2020 Wiley-VCH GmbH Aqueous zinc-ion batteries (ZIBs) have triggered a great deal of scientific research and become a promising alternative for large-scale energy storage applications, owing to the unique merits of high volumetric energy density, abundance of zinc resources, eco-friendliness, and safety. The pace of progress of ZIB development, however, is hindered by their poor reversibility and sluggish kinetics, derived from the dissolution of active materials in aqueous electrolytes and the strong electrostatic interactions between Zn2+ and the cathode lattice. Herein, a vanadium oxide (V2O5-x)/polyaniline (PANI-V) superlattice structure is demonstrated as a model of superlattice structural engineering to overcome these weaknesses. In this superlattice, the PANI layer not only plays the role of a spacer to expand the V2O5-x interlayer spacing but also serves as a conductive capacity contributor. Moreover, the PANI layer servers as structural stabilizer to restrain the dissolution of V2O5-x active materials in aqueous electrolytes. In addition, it introduces an interface effect to modulate the charge distribution of the V2O5-x monolayer, promoting Zn-ion diffusion into the structure. Correspondingly, weakening the electrostatic interactions and supressing the active materials dissolution synergistically boosts the electrochemical performance for Zn-ion storage. This work paves the way for the development/improvement of cathodes for aqueous zinc-ion batteries.

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http://hdl.handle.net/10453/146037