Uniform Polypyrrole Layer-Coated Sulfur/Graphene Aerogel via the Vapor-Phase Deposition Technique as the Cathode Material for Li-S Batteries.

Li, F; Kaiser, MR; Ma, J; Hou, Y; Zhou, T; Han, Z; Lai, W; Chen, J; Guo, Z; Liu, H; Wang, J

Uniform Polypyrrole Layer-Coated Sulfur/Graphene Aerogel via the Vapor-Phase Deposition Technique as the Cathode Material for Li-S Batteries.

Li, F Kaiser, MR Ma, J Hou, Y Zhou, T Han, Z Lai, W

Chen, J Guo, Z Liu, H Wang, J

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Publisher:: American Chemical Society (ACS)
Publication Type:: Journal Article
Citation:: ACS applied materials & interfaces, 2020, 12, (5), pp. 5958-5967
Issue Date:: 2020-02

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Field	Value	Language
dc.contributor.author	Li, F
dc.contributor.author	Kaiser, MR
dc.contributor.author	Ma, J
dc.contributor.author	Hou, Y
dc.contributor.author	Zhou, T
dc.contributor.author	Han, Z
dc.contributor.author	Lai, W https://orcid.org/0000-0002-8685-9662
dc.contributor.author	Chen, J
dc.contributor.author	Guo, Z
dc.contributor.author	Liu, H
dc.contributor.author	Wang, J
dc.date.accessioned	2021-03-07T23:03:10Z
dc.date.available	2021-03-07T23:03:10Z
dc.date.issued	2020-02
dc.identifier.citation	ACS applied materials & interfaces, 2020, 12, (5), pp. 5958-5967
dc.identifier.issn	1944-8244
dc.identifier.issn	1944-8252
dc.identifier.uri	http://hdl.handle.net/10453/146876
dc.description.abstract	The practical application of Li-S batteries is hampered because of their poor cycling stability caused by electrolyte-dissolved lithium polysulfides. Dual functionalities such as strong chemical adsorption stability and high conductivity are highly desired for an ideal host material for the sulfur-based cathode. Herein, a uniform polypyrrole layer-coated sulfur/graphene aerogel composite is designed and synthesized using a novel vapor-phase deposition method. The polypyrrole layer simultaneously acts as a host and an adsorbent for efficient suppression of polysulfide dissolution through strong chemical interaction. The density functional theory calculations reveal that the polypyrrole could trap lithium polysulfides through stronger bonding energy. In addition, the deflation of sulfur/graphene hydrogel during the vapor-phase deposition process enhances the contact of sulfur with matrices, resulting in high sulfur utilization and good rate capability. As a result, the synthesized polypyrrole-coated sulfur/graphene aerogel composite delivers specific discharge capacities of 1167 and 409.1 mA h g-1 at 0.2 and 5 C, respectively. Moreover, the composite can maintain a capacity of 698 mA h g-1 at 0.5 C after 500 cycles, showing an ultraslow decay rate of 0.03% per cycle.
dc.format	Print-Electronic
dc.language	eng
dc.publisher	American Chemical Society (ACS)
dc.relation.ispartof	ACS applied materials & interfaces
dc.relation.isbasedon	10.1021/acsami.9b20426
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	03 Chemical Sciences, 09 Engineering
dc.subject.classification	Nanoscience & Nanotechnology
dc.title	Uniform Polypyrrole Layer-Coated Sulfur/Graphene Aerogel via the Vapor-Phase Deposition Technique as the Cathode Material for Li-S Batteries.
dc.type	Journal Article
utslib.citation.volume	12
utslib.location.activity	United States
utslib.for	03 Chemical Sciences
utslib.for	09 Engineering
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	2021-03-07T23:03:08Z
pubs.issue	5
pubs.publication-status	Published
pubs.volume	12
utslib.citation.issue	5

Abstract:

The practical application of Li-S batteries is hampered because of their poor cycling stability caused by electrolyte-dissolved lithium polysulfides. Dual functionalities such as strong chemical adsorption stability and high conductivity are highly desired for an ideal host material for the sulfur-based cathode. Herein, a uniform polypyrrole layer-coated sulfur/graphene aerogel composite is designed and synthesized using a novel vapor-phase deposition method. The polypyrrole layer simultaneously acts as a host and an adsorbent for efficient suppression of polysulfide dissolution through strong chemical interaction. The density functional theory calculations reveal that the polypyrrole could trap lithium polysulfides through stronger bonding energy. In addition, the deflation of sulfur/graphene hydrogel during the vapor-phase deposition process enhances the contact of sulfur with matrices, resulting in high sulfur utilization and good rate capability. As a result, the synthesized polypyrrole-coated sulfur/graphene aerogel composite delivers specific discharge capacities of 1167 and 409.1 mA h g-1 at 0.2 and 5 C, respectively. Moreover, the composite can maintain a capacity of 698 mA h g-1 at 0.5 C after 500 cycles, showing an ultraslow decay rate of 0.03% per cycle.

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http://hdl.handle.net/10453/146876