Synthesis of carbon-modified cobalt disphosphide as anode for sodium-ion storage

Hu, Z; Tebyetekerwa, M; Elkholy, AE; Xia, Q; Hussain, T; Liu, H; Zhao, XS

Synthesis of carbon-modified cobalt disphosphide as anode for sodium-ion storage

Hu, Z Tebyetekerwa, M Elkholy, AE Xia, Q Hussain, T Liu, H Zhao, XS

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Publisher:: PERGAMON-ELSEVIER SCIENCE LTD
Publication Type:: Journal Article
Citation:: Electrochimica Acta, 2022, 423, pp. 10899-10902
Issue Date:: 2022-08-10

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Field	Value	Language
dc.contributor.author	Hu, Z
dc.contributor.author	Tebyetekerwa, M
dc.contributor.author	Elkholy, AE
dc.contributor.author	Xia, Q
dc.contributor.author	Hussain, T
dc.contributor.author	Liu, H
dc.contributor.author	Zhao, XS
dc.date.accessioned	2023-03-17T03:28:47Z
dc.date.available	2023-03-17T03:28:47Z
dc.date.issued	2022-08-10
dc.identifier.citation	Electrochimica Acta, 2022, 423, pp. 10899-10902
dc.identifier.issn	0013-4686
dc.identifier.issn	1873-3859
dc.identifier.uri	http://hdl.handle.net/10453/167429
dc.description.abstract	Phosphorus-rich metal phosphides have a high theoretical sodium-ion storage capacity. For example, cobalt disphosphide (CoP2) possesses a theoretical sodium-ion storage capacity of about 1330 mAh g−1, while the theoretical capacity of cobalt phosphide (CoP) is about 893 mAh g−1. However, it is currently challenging to synthesise phosphorus-rich metal phosphides. Herein, we report the synthesis of phosphorus-rich rod-like cobalt disphosphide with a carbon shell (CoP2@C) by thermal decomposition of polydopamine-coated cobalt oxalate in the presence of sodium hypophosphite. The as-obtained CoP2@C anode delivered a high sodium-ion storage capacity of ∼550 mAh g−1 at 500 mA g−1 due to its multi pseudocapacitive and intercalation charge storage mechanisms. These preliminary results show that CoP2@C hold a great promise for developing high-performance electrochemical energy storage devices based on sodium-ion as the charge carrier.
dc.language	English
dc.publisher	PERGAMON-ELSEVIER SCIENCE LTD
dc.relation.ispartof	Electrochimica Acta
dc.relation.isbasedon	10.1016/j.electacta.2022.140611
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	02 Physical Sciences, 03 Chemical Sciences, 09 Engineering
dc.subject.classification	Energy
dc.title	Synthesis of carbon-modified cobalt disphosphide as anode for sodium-ion storage
dc.type	Journal Article
utslib.citation.volume	423
utslib.for	02 Physical Sciences
utslib.for	03 Chemical Sciences
utslib.for	09 Engineering
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Civil and Environmental Engineering
utslib.copyright.status	closed_access	*
pubs.consider-herdc	false
dc.date.updated	2023-03-17T03:28:15Z
pubs.publication-status	Published
pubs.volume	423

Abstract:

Phosphorus-rich metal phosphides have a high theoretical sodium-ion storage capacity. For example, cobalt disphosphide (CoP2) possesses a theoretical sodium-ion storage capacity of about 1330 mAh g−1, while the theoretical capacity of cobalt phosphide (CoP) is about 893 mAh g−1. However, it is currently challenging to synthesise phosphorus-rich metal phosphides. Herein, we report the synthesis of phosphorus-rich rod-like cobalt disphosphide with a carbon shell (CoP2@C) by thermal decomposition of polydopamine-coated cobalt oxalate in the presence of sodium hypophosphite. The as-obtained CoP2@C anode delivered a high sodium-ion storage capacity of ∼550 mAh g−1 at 500 mA g−1 due to its multi pseudocapacitive and intercalation charge storage mechanisms. These preliminary results show that CoP2@C hold a great promise for developing high-performance electrochemical energy storage devices based on sodium-ion as the charge carrier.

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http://hdl.handle.net/10453/167429