Electrocatalyzing S Cathodes via Multisulfiphilic Sites for Superior Room-Temperature Sodium-Sulfur Batteries.

Liu, H; Pei, W; Lai, W-H; Yan, Z; Yang, H; Lei, Y; Wang, Y-X; Gu, Q; Zhou, S; Chou, S; Liu, HK; Dou, SX

Electrocatalyzing S Cathodes via Multisulfiphilic Sites for Superior Room-Temperature Sodium-Sulfur Batteries.

Liu, H Pei, W Lai, W-H Yan, Z Yang, H Lei, Y Wang, Y-X Gu, Q Zhou, S Chou, S Liu, HK Dou, SX

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Publisher:: AMER CHEMICAL SOC
Publication Type:: Journal Article
Citation:: ACS nano, 2020, 14, (6), pp. 7259-7268
Issue Date:: 2020-06

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Field	Value	Language
dc.contributor.author	Liu, H
dc.contributor.author	Pei, W
dc.contributor.author	Lai, W-H
dc.contributor.author	Yan, Z
dc.contributor.author	Yang, H
dc.contributor.author	Lei, Y
dc.contributor.author	Wang, Y-X
dc.contributor.author	Gu, Q
dc.contributor.author	Zhou, S
dc.contributor.author	Chou, S
dc.contributor.author	Liu, HK
dc.contributor.author	Dou, SX
dc.date.accessioned	2021-03-02T20:14:27Z
dc.date.available	2021-03-02T20:14:27Z
dc.date.issued	2020-06
dc.identifier.citation	ACS nano, 2020, 14, (6), pp. 7259-7268
dc.identifier.issn	1936-0851
dc.identifier.issn	1936-086X
dc.identifier.uri	http://hdl.handle.net/10453/146648
dc.description.abstract	Room-temperature sodium-sulfur (RT-Na/S) batteries hold great promise for sustainable and cost-effective applications. Nevertheless, it remains a great challenge to achieve high capacity and cycling stability due to the low activity of sulfur and the sluggish conversion kinetics between polysulfide intermediates and sodium sulfide. Herein, an electrocatalyzing S cathode is fabricated, which consists of porous core-shell structure and multisulfiphilic sites. The flexible carbon structure effectively buffers volume changes during cycling and provides enclosed spaces to store S8 with exceptional conductivity. Significantly, the multisulfiphilic sites (ZnS and CoS2) enhance catalysis toward multistep S conversion, which effectively suppresses long-chain polysulfides dissolution and improves the kinetics of short-chain polysulfides. Thus, the obtained S cathodes achieve an enhanced cycling performance (570 mAh g-1 at 0.2 A g-1 over 1000 cycles), decent rate capability (250 mAh g-1 at 1.0 A g-1 over 2000 cycles), and high energy density of 384 Wh kg-1 toward practical applications.
dc.format	Print-Electronic
dc.language	eng
dc.publisher	AMER CHEMICAL SOC
dc.relation.ispartof	ACS nano
dc.relation.isbasedon	10.1021/acsnano.0c02488
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject.classification	Nanoscience & Nanotechnology
dc.title	Electrocatalyzing S Cathodes via Multisulfiphilic Sites for Superior Room-Temperature Sodium-Sulfur Batteries.
dc.type	Journal Article
utslib.citation.volume	14
utslib.location.activity	United States
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
utslib.copyright.status	closed_access	*
dc.date.updated	2021-03-02T20:14:23Z
pubs.issue	6
pubs.publication-status	Published
pubs.volume	14
utslib.citation.issue	6

Abstract:

Room-temperature sodium-sulfur (RT-Na/S) batteries hold great promise for sustainable and cost-effective applications. Nevertheless, it remains a great challenge to achieve high capacity and cycling stability due to the low activity of sulfur and the sluggish conversion kinetics between polysulfide intermediates and sodium sulfide. Herein, an electrocatalyzing S cathode is fabricated, which consists of porous core-shell structure and multisulfiphilic sites. The flexible carbon structure effectively buffers volume changes during cycling and provides enclosed spaces to store S8 with exceptional conductivity. Significantly, the multisulfiphilic sites (ZnS and CoS2) enhance catalysis toward multistep S conversion, which effectively suppresses long-chain polysulfides dissolution and improves the kinetics of short-chain polysulfides. Thus, the obtained S cathodes achieve an enhanced cycling performance (570 mAh g-1 at 0.2 A g-1 over 1000 cycles), decent rate capability (250 mAh g-1 at 1.0 A g-1 over 2000 cycles), and high energy density of 384 Wh kg-1 toward practical applications.

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http://hdl.handle.net/10453/146648