Remarkable cycling durability of lithium-sulfur batteries with interconnected mesoporous hollow carbon nanospheres as high sulfur content host

Hou, J; Tu, X; Wu, X; Shen, M; Wang, X; Wang, C; Cao, C; Pang, H; Wang, G

Remarkable cycling durability of lithium-sulfur batteries with interconnected mesoporous hollow carbon nanospheres as high sulfur content host

Hou, J Tu, X Wu, X Shen, M Wang, X Wang, C Cao, C Pang, H Wang, G

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Publisher:: ELSEVIER SCIENCE SA
Publication Type:: Journal Article
Citation:: Chemical Engineering Journal, 2020, 401
Issue Date:: 2020-12-01

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Field	Value	Language
dc.contributor.author	Hou, J
dc.contributor.author	Tu, X
dc.contributor.author	Wu, X
dc.contributor.author	Shen, M
dc.contributor.author	Wang, X
dc.contributor.author	Wang, C
dc.contributor.author	Cao, C
dc.contributor.author	Pang, H
dc.contributor.author	Wang, G https://orcid.org/0000-0003-4295-8578
dc.date.accessioned	2021-01-14T04:06:48Z
dc.date.available	2021-01-14T04:06:48Z
dc.date.issued	2020-12-01
dc.identifier.citation	Chemical Engineering Journal, 2020, 401
dc.identifier.issn	1385-8947
dc.identifier.issn	1873-3212
dc.identifier.uri	http://hdl.handle.net/10453/145423
dc.description.abstract	© 2020 Elsevier B.V. To reduce capacity attenuation during cycling and improve ultrahigh-sulfur-loading of Li-S batteries, we have manufactured nitrogen doped hollow carbon nanospheres (60 nm) with interconnected mesoporous shell (MHCS) as conducting frameworks for sulfur loading. One-step dual template technique is employed to prepare nitrogen doped polymer-silica nanocomposites with “interpenetration twins” nano-architectures at the initial stage. After carbonization and etching of silica, the “interpenetration twins” nano-architectures converted into interconnected functionalized mesoporous carbon nanospheres that endow desired micro-mesoporous volume (4.75 cm3/g) and high-specific area (SBET, 1875 m2/g). To the best of our knowledge, we achieved the highest sulfur content (90.4 wt%) in the carbon-based cathodes due to the interlinked pore network between S and carbon skeleton, which is formed by occupying the space of the removed silica with sulfur. In this way sulfur element could be closely contacted with the conductive carbon skeleton. Furthermore, polyethylene oxide (PEO) and polyvinylpyrrolidone (PVP) composite polymer were adhesive on the encapsulated carbon shell to limit the leakage of lithium sulfide leading to an improved the capacity retention of Li-S batteries. Noticeably, the average of the capacity decay reached to 0.023% per cycle during 3,100 cycles, which represent optimal performance of long-period lithium-sulfur batteries heretofore. The effortless method can provide a new way to design exceptionally high pore volume with interconnected mesoporous, and maintained definite hollow nanostructure, which are critical for porous carbons and energy storage.
dc.language	English
dc.publisher	ELSEVIER SCIENCE SA
dc.relation.ispartof	Chemical Engineering Journal
dc.relation.isbasedon	10.1016/j.cej.2020.126141
dc.rights	info:eu-repo/semantics/restrictedAccess
dc.subject	0904 Chemical Engineering, 0905 Civil Engineering, 0907 Environmental Engineering
dc.subject.classification	Chemical Engineering
dc.title	Remarkable cycling durability of lithium-sulfur batteries with interconnected mesoporous hollow carbon nanospheres as high sulfur content host
dc.type	Journal Article
utslib.citation.volume	401
utslib.for	0904 Chemical Engineering
utslib.for	0905 Civil Engineering
utslib.for	0907 Environmental Engineering
pubs.organisational-group	/University of Technology Sydney/Faculty of Science
pubs.organisational-group	/University of Technology Sydney/Strength - CCET - Centre for Clean Energy Technology
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	*
pubs.consider-herdc	false
dc.date.updated	2021-01-14T04:06:24Z
pubs.publication-status	Published
pubs.volume	401

Abstract:

© 2020 Elsevier B.V. To reduce capacity attenuation during cycling and improve ultrahigh-sulfur-loading of Li-S batteries, we have manufactured nitrogen doped hollow carbon nanospheres (60 nm) with interconnected mesoporous shell (MHCS) as conducting frameworks for sulfur loading. One-step dual template technique is employed to prepare nitrogen doped polymer-silica nanocomposites with “interpenetration twins” nano-architectures at the initial stage. After carbonization and etching of silica, the “interpenetration twins” nano-architectures converted into interconnected functionalized mesoporous carbon nanospheres that endow desired micro-mesoporous volume (4.75 cm3/g) and high-specific area (SBET, 1875 m2/g). To the best of our knowledge, we achieved the highest sulfur content (90.4 wt%) in the carbon-based cathodes due to the interlinked pore network between S and carbon skeleton, which is formed by occupying the space of the removed silica with sulfur. In this way sulfur element could be closely contacted with the conductive carbon skeleton. Furthermore, polyethylene oxide (PEO) and polyvinylpyrrolidone (PVP) composite polymer were adhesive on the encapsulated carbon shell to limit the leakage of lithium sulfide leading to an improved the capacity retention of Li-S batteries. Noticeably, the average of the capacity decay reached to 0.023% per cycle during 3,100 cycles, which represent optimal performance of long-period lithium-sulfur batteries heretofore. The effortless method can provide a new way to design exceptionally high pore volume with interconnected mesoporous, and maintained definite hollow nanostructure, which are critical for porous carbons and energy storage.

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http://hdl.handle.net/10453/145423