Multiregion Janus-Featured Cobalt Phosphide-Cobalt Composite for Highly Reversible Room-Temperature Sodium-Sulfur Batteries.

Yan, Z; Liang, Y; Hua, W; Zhang, X-G; Lai, W; Hu, Z; Wang, W; Peng, J; Indris, S; Wang, Y; Chou, S-L; Liu, H; Dou, S-X

Multiregion Janus-Featured Cobalt Phosphide-Cobalt Composite for Highly Reversible Room-Temperature Sodium-Sulfur Batteries.

Yan, Z Liang, Y Hua, W Zhang, X-G Lai, W

Hu, Z Wang, W Peng, J Indris, S Wang, Y Chou, S-L Liu, H Dou, S-X

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Publisher:: AMER CHEMICAL SOC
Publication Type:: Journal Article
Citation:: ACS nano, 2020, 14, (8), pp. 10284-10293
Issue Date:: 2020-08

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Field	Value	Language
dc.contributor.author	Yan, Z
dc.contributor.author	Liang, Y
dc.contributor.author	Hua, W
dc.contributor.author	Zhang, X-G
dc.contributor.author	Lai, W https://orcid.org/0000-0002-8685-9662
dc.contributor.author	Hu, Z
dc.contributor.author	Wang, W
dc.contributor.author	Peng, J
dc.contributor.author	Indris, S
dc.contributor.author	Wang, Y
dc.contributor.author	Chou, S-L
dc.contributor.author	Liu, H
dc.contributor.author	Dou, S-X
dc.date.accessioned	2021-03-15T04:17:26Z
dc.date.available	2021-03-15T04:17:26Z
dc.date.issued	2020-08
dc.identifier.citation	ACS nano, 2020, 14, (8), pp. 10284-10293
dc.identifier.issn	1936-0851
dc.identifier.issn	1936-086X
dc.identifier.uri	http://hdl.handle.net/10453/147156
dc.description.abstract	Electrode materials with high conductivity, strong chemisorption, and catalysis toward polysulfides are recognized as key factors for metal-sulfur batteries. Nevertheless, the construction of such functional material is a challenge for room-temperature sodium-sulfur (RT-Na/S) batteries. Herein, a multiregion Janus-featured CoP-Co structure obtained <i>via</i> sequential carbonization-oxidation-phosphidation of heteroseed zeolitic imidazolate frameworks is introduced. The structural virtues include a heterostructure existing in a CoP-Co structure and a conductive network of N-doped porous carbon nanotube hollow cages (NCNHCs), endowing it with superior conductivity in both the short- and long-range and strong polarity toward polysulfides. Thus, the S@CoP-Co/NCNHC cathode exhibits superior electrochemical performance (448 mAh g<sup>-1</sup> remained for 700 times cycling under 1 A g<sup>-1</sup>) and an optimized redox mechanism in polysulfides conversion. Density functional theory calculations present that the CoP-Co structure optimizes bond structure and bandwidth, whereas the pure CoP is lower than the corresponding Fermi level, which could essentially benefit the adsorptive capability and charge transfer from the CoP-Co surface to Na<sub>2</sub>S<i><sub><i>x</i></sub></i> and therefore improve its affinity to polysulfides.
dc.format	Print-Electronic
dc.language	eng
dc.publisher	AMER CHEMICAL SOC
dc.relation.ispartof	ACS nano
dc.relation.isbasedon	10.1021/acsnano.0c03737
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject.classification	Nanoscience & Nanotechnology
dc.title	Multiregion Janus-Featured Cobalt Phosphide-Cobalt Composite for Highly Reversible 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
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
utslib.copyright.status	closed_access	*
dc.date.updated	2021-03-15T04:17:23Z
pubs.issue	8
pubs.publication-status	Published
pubs.volume	14
utslib.citation.issue	8

Abstract:

Electrode materials with high conductivity, strong chemisorption, and catalysis toward polysulfides are recognized as key factors for metal-sulfur batteries. Nevertheless, the construction of such functional material is a challenge for room-temperature sodium-sulfur (RT-Na/S) batteries. Herein, a multiregion Janus-featured CoP-Co structure obtained via sequential carbonization-oxidation-phosphidation of heteroseed zeolitic imidazolate frameworks is introduced. The structural virtues include a heterostructure existing in a CoP-Co structure and a conductive network of N-doped porous carbon nanotube hollow cages (NCNHCs), endowing it with superior conductivity in both the short- and long-range and strong polarity toward polysulfides. Thus, the S@CoP-Co/NCNHC cathode exhibits superior electrochemical performance (448 mAh g^-1 remained for 700 times cycling under 1 A g^-1) and an optimized redox mechanism in polysulfides conversion. Density functional theory calculations present that the CoP-Co structure optimizes bond structure and bandwidth, whereas the pure CoP is lower than the corresponding Fermi level, which could essentially benefit the adsorptive capability and charge transfer from the CoP-Co surface to Na₂S_x and therefore improve its affinity to polysulfides.

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http://hdl.handle.net/10453/147156