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Title: Carbon coated lithium cobalt phosphate for Li-ion batteries: Comparison of three coating techniques
Authors: Ni, J.
Gao, L.
Lu, L. 
Keywords: Carbon coating
Electrochemical behavior
Lithium cobalt phosphate
Lithium ion battery
Issue Date: 1-Jan-2013
Citation: Ni, J., Gao, L., Lu, L. (2013-01-01). Carbon coated lithium cobalt phosphate for Li-ion batteries: Comparison of three coating techniques. Journal of Power Sources 221 : 35-41. ScholarBank@NUS Repository.
Abstract: Three techniques, i.e., pyrolysis of sucrose, spray of acetylene black, and propane vapor deposition, are adopted to coat carbon onto the surface of LiCoPO 4 particles, and their effects are compared. The LiCoPO 4/C composites are characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), galvanostatic charge-discharge, and electrochemical impedance spectroscopy (EIS). The results show that the coating techniques determine the property of carbon films formed on the surface of LiCoPO 4 particles, which further affect the performance of LiCoPO 4. A complete and homogeneous carbon layer is the key to a high electrochemical activity and stable cycle performance. Among these LiCoPO 4/C composites, the material processed via the deposition technique shows a more uniform carbon layer than that of the others, thus it exhibits a large reversible capacity of 130 mA h g -1 with favorable cyclability and rate capability in the voltage range of 3.0-5.0 V. © 2012 Elsevier B.V. All rights reserved.
Source Title: Journal of Power Sources
ISSN: 03787753
DOI: 10.1016/j.jpowsour.2012.07.107
Appears in Collections:Staff Publications

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