Atomic-scale regulation of anionic and cationic migration in alkali metal batteries

Xiong, P; Zhang, F; Zhang, X; Liu, Y; Wu, Y; Wang, S; Safaei, J; Sun, B; Ma, R; Liu, Z; Bando, Y; Sasaki, T; Wang, X; Zhu, J; Wang, G

Atomic-scale regulation of anionic and cationic migration in alkali metal batteries

Xiong, P Zhang, F Zhang, X Liu, Y Wu, Y Wang, S Safaei, J

Sun, B

Ma, R Liu, Z Bando, Y Sasaki, T Wang, X Zhu, J Wang, G

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Publisher:: Nature Research
Publication Type:: Journal Article
Citation:: Nature Communications, 2021, 12, (1), pp. 1-15
Issue Date:: 2021-07-07

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Field	Value	Language
dc.contributor.author	Xiong, P
dc.contributor.author	Zhang, F
dc.contributor.author	Zhang, X
dc.contributor.author	Liu, Y
dc.contributor.author	Wu, Y
dc.contributor.author	Wang, S
dc.contributor.author	Safaei, J https://orcid.org/0000-0003-3397-5026
dc.contributor.author	Sun, B https://orcid.org/0000-0002-4365-486X
dc.contributor.author	Ma, R
dc.contributor.author	Liu, Z
dc.contributor.author	Bando, Y
dc.contributor.author	Sasaki, T
dc.contributor.author	Wang, X
dc.contributor.author	Zhu, J
dc.contributor.author	Wang, G https://orcid.org/0000-0003-4295-8578
dc.date.accessioned	2022-02-16T04:59:25Z
dc.date.available	2021-06-07
dc.date.available	2022-02-16T04:59:25Z
dc.date.issued	2021-07-07
dc.identifier.citation	Nature Communications, 2021, 12, (1), pp. 1-15
dc.identifier.issn	2041-1723
dc.identifier.issn	2041-1723
dc.identifier.uri	http://hdl.handle.net/10453/154607
dc.description.abstract	The regulation of anions and cations at the atomic scale is of great significance in membrane-based separation technologies. Ionic transport regulation techniques could also play a crucial role in developing high-performance alkali metal batteries such as alkali metal-sulfur and alkali metal-selenium batteries, which suffer from the non-uniform transport of alkali metal ions (e.g., Li+ or Na+) and detrimental shuttling effect of polysulfide/polyselenide anions. These drawbacks could cause unfavourable growth of alkali metal depositions at the metal electrode and irreversible consumption of cathode active materials, leading to capacity decay and short cycling life. Herein, we propose the use of a polypropylene separator coated with negatively charged Ti0.87O2 nanosheets with Ti atomic vacancies to tackle these issues. In particular, we demonstrate that the electrostatic interactions between the negatively charged Ti0.87O2 nanosheets and polysulfide/polyselenide anions reduce the shuttling effect. Moreover, the Ti0.87O2-coated separator regulates the migration of alkali ions ensuring a homogeneous ion flux and the Ti vacancies, acting as sub-nanometric pores, promote fast alkali-ion diffusion.
dc.format	Electronic
dc.language	eng
dc.publisher	Nature Research
dc.relation	http://purl.org/au-research/grants/arc/DP200101249
dc.relation.ispartof	Nature Communications
dc.relation.isbasedon	10.1038/s41467-021-24399-9
dc.rights	info:eu-repo/semantics/openAccess
dc.title	Atomic-scale regulation of anionic and cationic migration in alkali metal batteries
dc.type	Journal Article
utslib.citation.volume	12
utslib.location.activity	England
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/Strength - CCET - Centre for Clean Energy Technology
utslib.copyright.status	open_access	*
pubs.consider-herdc	false
dc.date.updated	2022-02-16T04:59:19Z
pubs.issue	1
pubs.publication-status	Published
pubs.volume	12
utslib.citation.issue	1

Abstract:

The regulation of anions and cations at the atomic scale is of great significance in membrane-based separation technologies. Ionic transport regulation techniques could also play a crucial role in developing high-performance alkali metal batteries such as alkali metal-sulfur and alkali metal-selenium batteries, which suffer from the non-uniform transport of alkali metal ions (e.g., Li+ or Na+) and detrimental shuttling effect of polysulfide/polyselenide anions. These drawbacks could cause unfavourable growth of alkali metal depositions at the metal electrode and irreversible consumption of cathode active materials, leading to capacity decay and short cycling life. Herein, we propose the use of a polypropylene separator coated with negatively charged Ti0.87O2 nanosheets with Ti atomic vacancies to tackle these issues. In particular, we demonstrate that the electrostatic interactions between the negatively charged Ti0.87O2 nanosheets and polysulfide/polyselenide anions reduce the shuttling effect. Moreover, the Ti0.87O2-coated separator regulates the migration of alkali ions ensuring a homogeneous ion flux and the Ti vacancies, acting as sub-nanometric pores, promote fast alkali-ion diffusion.

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http://hdl.handle.net/10453/154607