Bismuth: A new anode for the Na-ion battery

Su, D; Dou, S; Wang, G

Bismuth: A new anode for the Na-ion battery

Su, D

Dou, S Wang, G

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Publication Type:: Journal Article
Citation:: Nano Energy, 2015, 12 pp. 88 - 95
Issue Date:: 2015-03-01

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Field	Value	Language
dc.contributor.author	Su, D https://orcid.org/0000-0002-3972-8205	en_US
dc.contributor.author	Dou, S	en_US
dc.contributor.author	Wang, G https://orcid.org/0000-0003-4295-8578	en_US
dc.date.issued	2015-03-01	en_US
dc.identifier.citation	Nano Energy, 2015, 12 pp. 88 - 95	en_US
dc.identifier.issn	2211-2855	en_US
dc.identifier.uri	http://hdl.handle.net/10453/37673
dc.description.abstract	© 2015. Bismuth nanoparticles wrapped by graphene have been synthesized. Refined X-ray diffraction, scanning electron microscopy, and transmission electron microscopy analyses have revealed the phase, crystal structure, and morphology of the Bi@graphene nanocomposite. When applied as anode in Na-ion batteries, Bi@graphene nanocomposite exhibited a high reversible sodium storage capacity of about 561mAhg-1 within the 2.0-0.01V voltage range and 358mAhg-1 within the 0.9-0.3V voltage range. Ex-situ X-ray diffraction measurements were used to study the reaction mechanism with Na. It was found that bismuth does not follow the alloying mechanism with Na, and surprisingly, an intercalation process has been evidenced. The as-prepared Bi@graphene nanocomposite also demonstrated excellent high rate performance. This superior electrochemical performance could be ascribed to the unique layered crystal structure of Bi, which has large interlayer spacing along the c-axis (d(003)=3.95Å) to accommodate the Na ions. Furthermore, the three-dimensional architecture of the Bi@graphene nanocomposite also contributes to better conductivity and stability of the electrodes. Via density function theory calculations, it was found that the Bi could provide facile sites for Na ion diffusion and accommodation, based on the intercalation mechanism instead of the alloying process.	en_US
dc.relation.ispartof	Nano Energy	en_US
dc.relation.isbasedon	10.1016/j.nanoen.2014.12.012	en_US
dc.title	Bismuth: A new anode for the Na-ion battery	en_US
dc.type	Journal Article
utslib.citation.volume	12	en_US
utslib.for	0303 Macromolecular and Materials Chemistry	en_US
utslib.for	0912 Materials Engineering	en_US
utslib.for	1007 Nanotechnology	en_US
pubs.embargo.period	Not known	en_US
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
pubs.organisational-group	/University of Technology Sydney/Strength - CCET - Centre for Clean Energy Technology
utslib.copyright.status	closed_access
pubs.publication-status	Published	en_US
pubs.volume	12	en_US

Abstract:

© 2015. Bismuth nanoparticles wrapped by graphene have been synthesized. Refined X-ray diffraction, scanning electron microscopy, and transmission electron microscopy analyses have revealed the phase, crystal structure, and morphology of the Bi@graphene nanocomposite. When applied as anode in Na-ion batteries, Bi@graphene nanocomposite exhibited a high reversible sodium storage capacity of about 561mAhg-1 within the 2.0-0.01V voltage range and 358mAhg-1 within the 0.9-0.3V voltage range. Ex-situ X-ray diffraction measurements were used to study the reaction mechanism with Na. It was found that bismuth does not follow the alloying mechanism with Na, and surprisingly, an intercalation process has been evidenced. The as-prepared Bi@graphene nanocomposite also demonstrated excellent high rate performance. This superior electrochemical performance could be ascribed to the unique layered crystal structure of Bi, which has large interlayer spacing along the c-axis (d(003)=3.95Å) to accommodate the Na ions. Furthermore, the three-dimensional architecture of the Bi@graphene nanocomposite also contributes to better conductivity and stability of the electrodes. Via density function theory calculations, it was found that the Bi could provide facile sites for Na ion diffusion and accommodation, based on the intercalation mechanism instead of the alloying process.

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http://hdl.handle.net/10453/37673