A Fe<sub>3</sub>N/carbon composite electrocatalyst for effective polysulfides regulation in room-temperature Na-S batteries.

Qi, Y; Li, Q-J; Wu, Y; Bao, S-J; Li, C; Chen, Y; Wang, G; Xu, M

A Fe<sub>3</sub>N/carbon composite electrocatalyst for effective polysulfides regulation in room-temperature Na-S batteries.

Qi, Y Li, Q-J Wu, Y Bao, S-J Li, C Chen, Y Wang, G

Xu, M

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Publisher:: Springer Science and Business Media LLC
Publication Type:: Journal Article
Citation:: Nature communications, 2021, 12, (1), pp. 6347
Issue Date:: 2021-11-03

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Field	Value	Language
dc.contributor.author	Qi, Y
dc.contributor.author	Li, Q-J
dc.contributor.author	Wu, Y
dc.contributor.author	Bao, S-J
dc.contributor.author	Li, C
dc.contributor.author	Chen, Y
dc.contributor.author	Wang, G https://orcid.org/0000-0003-4295-8578
dc.contributor.author	Xu, M
dc.date.accessioned	2021-11-29T03:47:34Z
dc.date.available	2021-10-12
dc.date.available	2021-11-29T03:47:34Z
dc.date.issued	2021-11-03
dc.identifier.citation	Nature communications, 2021, 12, (1), pp. 6347
dc.identifier.issn	2041-1723
dc.identifier.issn	2041-1723
dc.identifier.uri	http://hdl.handle.net/10453/151902
dc.description.abstract	The practical application of room-temperature Na-S batteries is hindered by the low sulfur utilization, inadequate rate capability and poor cycling performance. To circumvent these issues, here, we propose an electrocatalyst composite material comprising of N-doped nanocarbon and Fe<sub>3</sub>N. The multilayered porous network of the carbon accommodates large amounts of sulfur, decreases the detrimental effect of volume expansion, and stabilizes the electrodes structure during cycling. Experimental and theoretical results testify the Fe<sub>3</sub>N affinity to sodium polysulfides via Na-N and Fe-S bonds, leading to strong adsorption and fast dissociation of sodium polysulfides. With a sulfur content of 85 wt.%, the positive electrode tested at room-temperature in non-aqueous Na metal coin cell configuration delivers a reversible capacity of about 1165 mA h g<sup>-1</sup> at 167.5 mA g<sup>-1</sup>, satisfactory rate capability and stable capacity of about 696 mA h g<sup>-1</sup> for 2800 cycles at 8375 mA g<sup>-1</sup>.
dc.format	Electronic
dc.language	eng
dc.publisher	Springer Science and Business Media LLC
dc.relation.ispartof	Nature communications
dc.relation.isbasedon	10.1038/s41467-021-26631-y
dc.rights	info:eu-repo/semantics/openAccess
dc.title	A Fe<sub>3</sub>N/carbon composite electrocatalyst for effective polysulfides regulation in room-temperature Na-S 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	*
dc.date.updated	2021-11-29T03:47:32Z
pubs.issue	1
pubs.publication-status	Published
pubs.volume	12
utslib.citation.issue	1

Abstract:

The practical application of room-temperature Na-S batteries is hindered by the low sulfur utilization, inadequate rate capability and poor cycling performance. To circumvent these issues, here, we propose an electrocatalyst composite material comprising of N-doped nanocarbon and Fe₃N. The multilayered porous network of the carbon accommodates large amounts of sulfur, decreases the detrimental effect of volume expansion, and stabilizes the electrodes structure during cycling. Experimental and theoretical results testify the Fe₃N affinity to sodium polysulfides via Na-N and Fe-S bonds, leading to strong adsorption and fast dissociation of sodium polysulfides. With a sulfur content of 85 wt.%, the positive electrode tested at room-temperature in non-aqueous Na metal coin cell configuration delivers a reversible capacity of about 1165 mA h g^-1 at 167.5 mA g^-1, satisfactory rate capability and stable capacity of about 696 mA h g^-1 for 2800 cycles at 8375 mA g^-1.

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http://hdl.handle.net/10453/151902