Morphology control and electrochemical properties of nanosize LiFePO <inf>4</inf> cathode material synthesized by co-precipitation combined with in situ polymerization

Wang, Y; Sun, B; Park, J; Kim, WS; Kim, HS; Wang, G

Morphology control and electrochemical properties of nanosize LiFePO <inf>4</inf> cathode material synthesized by co-precipitation combined with in situ polymerization

Wang, Y

Sun, B

Park, J Kim, WS Kim, HS Wang, G

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Publication Type:: Journal Article
Citation:: Journal of Alloys and Compounds, 2011, 509 (3), pp. 1040 - 1044
Issue Date:: 2011-01-21

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Field	Value	Language
dc.contributor.author	Wang, Y https://orcid.org/0000-0002-0290-0112	en_US
dc.contributor.author	Sun, B https://orcid.org/0000-0002-4365-486X	en_US
dc.contributor.author	Park, J	en_US
dc.contributor.author	Kim, WS	en_US
dc.contributor.author	Kim, HS	en_US
dc.contributor.author	Wang, G https://orcid.org/0000-0003-4295-8578	en_US
dc.date.issued	2011-01-21	en_US
dc.identifier.citation	Journal of Alloys and Compounds, 2011, 509 (3), pp. 1040 - 1044	en_US
dc.identifier.issn	0925-8388	en_US
dc.identifier.uri	http://hdl.handle.net/10453/15347
dc.description.abstract	Nanosize carbon coated LiFePO4 cathode material was synthesized by in situ polymerization. The as-prepared LiFePO4 cathode material was systematically characterized by X-ray diffraction, thermogravimetric- differential scanning calorimetry, X-ray photo-electron spectroscopy, field-emission scanning electron microscopy, and transmission electron microscopy techniques. Field-emission scanning electron microscopy (FESEM) and transmission electron microscopy (TEM) images revealed that the morphology of the LiFePO4 consists of primary particles (40-50 nm) and agglomerated secondary particles (100-110 nm). Each particle is evenly coated with an amorphous carbon layer, which has a thickness around 3-5 nm. The electrochemical properties were examined by cyclic voltammetry and charge-discharge testing. The as-prepared LiFePO4 can deliver an initial discharge capacity of 145 mAh/g, 150 mAh/g, and 134 mAh/g at 0.2 C, 1 C, and 2 C rates, respectively, and exhibits excellent cycling stability. At a higher C-rate (5 C) a slight capacity loss could be found. However after being charge-discharge at lower C-rates, LiFePO4 can be regenerated and deliver the discharge capacity of 145 mAh/g at 0.2 C. © 2010 Elsevier B.V. All rights reserved.	en_US
dc.relation	http://purl.org/au-research/grants/arc/LP0989134
dc.relation.ispartof	Journal of Alloys and Compounds	en_US
dc.relation.isbasedon	10.1016/j.jallcom.2010.08.161	en_US
dc.subject.classification	Materials	en_US
dc.title	Morphology control and electrochemical properties of nanosize LiFePO <inf>4</inf> cathode material synthesized by co-precipitation combined with in situ polymerization	en_US
dc.type	Journal Article
utslib.citation.volume	3	en_US
utslib.citation.volume	509	en_US
utslib.for	0912 Materials Engineering	en_US
utslib.for	0204 Condensed Matter Physics	en_US
utslib.for	0914 Resources Engineering and Extractive Metallurgy	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.issue	3	en_US
pubs.publication-status	Published	en_US
pubs.volume	509	en_US

Abstract:

Nanosize carbon coated LiFePO4 cathode material was synthesized by in situ polymerization. The as-prepared LiFePO4 cathode material was systematically characterized by X-ray diffraction, thermogravimetric- differential scanning calorimetry, X-ray photo-electron spectroscopy, field-emission scanning electron microscopy, and transmission electron microscopy techniques. Field-emission scanning electron microscopy (FESEM) and transmission electron microscopy (TEM) images revealed that the morphology of the LiFePO4 consists of primary particles (40-50 nm) and agglomerated secondary particles (100-110 nm). Each particle is evenly coated with an amorphous carbon layer, which has a thickness around 3-5 nm. The electrochemical properties were examined by cyclic voltammetry and charge-discharge testing. The as-prepared LiFePO4 can deliver an initial discharge capacity of 145 mAh/g, 150 mAh/g, and 134 mAh/g at 0.2 C, 1 C, and 2 C rates, respectively, and exhibits excellent cycling stability. At a higher C-rate (5 C) a slight capacity loss could be found. However after being charge-discharge at lower C-rates, LiFePO4 can be regenerated and deliver the discharge capacity of 145 mAh/g at 0.2 C. © 2010 Elsevier B.V. All rights reserved.

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http://hdl.handle.net/10453/15347