Journal
JOURNAL OF POWER SOURCES
Volume 202, Issue -, Pages 384-388Publisher
ELSEVIER
DOI: 10.1016/j.jpowsour.2011.11.063
Keywords
Lithium iron phosphate; Nanorods; Ionic liquid; Charge and discharge; Capability
Funding
- National Science Foundation of China [20943004]
- Six Talent Climax Foundation of Jiangsu [20100292]
- 333 Outstanding Youth Scientist Foundation of Jiangsu [20110211]
- Korea Research Foundation [KRF-2007-412-J04003]
- National Research Foundation of Korea [2007-412-J04003] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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In this work, the LiFePO4 nanorods are synthesized in an ionic liquid (IL) in the presence of a surfactant. The samples are characterized by X-ray diffraction, scanning electron microscopy, high resolution transmission electron microscopy, electron diffraction and nitrogen adsorption. The as-obtained LiFePO4 nanorods in the IL have the diameter of about 200 nm and the length of 1-2 mu m; but the aggregated LiFePO4 microparticles are obtained in the aqueous solution. The results show that a higher temperature and a longer duration are needed in the IL than in the aqueous solution for the formation of LiFePO4; that both IL and the surfactant play the key roles in the formation of LiFePO4 nanorods. Furthermore, their charge and discharge properties are investigated. The LiFePO4 nanorods show a higher discharge capacity (150 at 1C rate) and a higher rate capability than the aggregated particles (133 mAh g(-1)). The adopted IL approach may provide a green route to achieve excellent battery materials. (C) 2011 Elsevier B.V. All rights reserved.
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