A hydro-stable and phase-transition-free P2-type cathode with superior cycling stability for high-voltage sodium-ion batteries

Xiao, J; Gao, H; Xiao, Y; Wang, S; Gong, C; Huang, Z; Sun, B; Dong, CL; Guo, X; Liu, H; Wang, G

A hydro-stable and phase-transition-free P2-type cathode with superior cycling stability for high-voltage sodium-ion batteries

Xiao, J Gao, H Xiao, Y Wang, S

Gong, C Huang, Z Sun, B Dong, CL Guo, X Liu, H

Wang, G

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Publisher:: ELSEVIER SCIENCE SA
Publication Type:: Journal Article
Citation:: Chemical Engineering Journal, 2025, 506
Issue Date:: 2025-01-15

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Field	Value	Language
dc.contributor.author	Xiao, J
dc.contributor.author	Gao, H
dc.contributor.author	Xiao, Y
dc.contributor.author	Wang, S https://orcid.org/0009-0000-0519-4842
dc.contributor.author	Gong, C
dc.contributor.author	Huang, Z
dc.contributor.author	Sun, B
dc.contributor.author	Dong, CL
dc.contributor.author	Guo, X
dc.contributor.author	Liu, H https://orcid.org/0000-0003-0266-9472
dc.contributor.author	Wang, G
dc.date.accessioned	2025-08-06T04:05:47Z
dc.date.available	2025-08-06T04:05:47Z
dc.date.issued	2025-01-15
dc.identifier.citation	Chemical Engineering Journal, 2025, 506
dc.identifier.issn	1385-8947
dc.identifier.issn	1873-3212
dc.identifier.uri	http://hdl.handle.net/10453/189166
dc.description.abstract	A dual-site substitution strategy was applied to enhance the electrochemical performance of sodium-ion batteries, leading to the development of the Na<inf>0.80</inf>Mg<inf>0.03</inf>Li<inf>0.18</inf>Mn<inf>0.67</inf>Cu<inf>0.15</inf>O<inf>2</inf> cathode material. By introducing Mg and Cu ions at multiple sites, the local chemical environment was optimized, resulting in improved ion diffusion kinetics and charge transfer dynamics, which accelerate the overall electrochemical reactions. Mg ions substituted at Na sites act as “pillars” effectively mitigating detrimental O<sup>2−</sup>–O<sup>2−</sup> electrostatic repulsion and enabling stable anion redox activity. This novel cathode demonstrates a high specific capacity of 162 mAh/g, excellent rate capability with 114 mAh/g at 1000 mA g<sup>−1</sup> (8C), and superior cycling stability with 80.3 % capacity retention after 300 cycles. Furthermore, the dual-site substitution minimizes volume variation to just 1.3 % during electrochemical processes and significantly enhances moisture resistance, offering promising potential for practical sodium-ion battery applications.
dc.language	English
dc.publisher	ELSEVIER SCIENCE SA
dc.relation	http://purl.org/au-research/grants/arc/FT180100705
dc.relation.ispartof	Chemical Engineering Journal
dc.relation.isbasedon	10.1016/j.cej.2025.160010
dc.rights	info:eu-repo/semantics/openAccess
dc.subject	0904 Chemical Engineering, 0905 Civil Engineering, 0907 Environmental Engineering
dc.subject.classification	Chemical Engineering
dc.subject.classification	4004 Chemical engineering
dc.subject.classification	4011 Environmental engineering
dc.subject.classification	4016 Materials engineering
dc.title	A hydro-stable and phase-transition-free P2-type cathode with superior cycling stability for high-voltage sodium-ion batteries
dc.type	Journal Article
utslib.citation.volume	506
utslib.for	0904 Chemical Engineering
utslib.for	0905 Civil Engineering
utslib.for	0907 Environmental 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	2025-08-06T04:05:40Z
pubs.publication-status	Published
pubs.volume	506

Abstract:

A dual-site substitution strategy was applied to enhance the electrochemical performance of sodium-ion batteries, leading to the development of the Na0.80Mg0.03Li0.18Mn0.67Cu0.15O2 cathode material. By introducing Mg and Cu ions at multiple sites, the local chemical environment was optimized, resulting in improved ion diffusion kinetics and charge transfer dynamics, which accelerate the overall electrochemical reactions. Mg ions substituted at Na sites act as “pillars” effectively mitigating detrimental O²⁻–O²⁻ electrostatic repulsion and enabling stable anion redox activity. This novel cathode demonstrates a high specific capacity of 162 mAh/g, excellent rate capability with 114 mAh/g at 1000 mA g⁻¹ (8C), and superior cycling stability with 80.3 % capacity retention after 300 cycles. Furthermore, the dual-site substitution minimizes volume variation to just 1.3 % during electrochemical processes and significantly enhances moisture resistance, offering promising potential for practical sodium-ion battery applications.

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http://hdl.handle.net/10453/189166