Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/106593
Title: Synthesis and enhanced electrochemical performance of Li2CoPO4F cathodes under high current cycling
Authors: Kim, G. J.
Karthikeyan, K.
Chung, K. Y.
Cho, B. W.
Lee, Y. S.
Aravindan, Vanchiappan
Amaresh, Samuthirapandian
Issue Date: 2012
Source: Amaresh, S., Kim, G. J., Karthikeyan, K., Aravindan, V., Chung, K. Y., Cho, B. W., et al. (2012). Synthesis and enhanced electrochemical performance of Li2CoPO4F cathodes under high current cycling. Physical Chemistry Chemical Physics, 14(34), 11904-11909.
Series/Report no.: Physical chemistry chemical physics
Abstract: Lithium cobalt fluorophosphate, Li2CoPO4F, is successfully synthesized by a solid state reaction under Ar flow at 700 °C. X-ray diffraction and scanning electron microscopic studies are utilized to analyze the structural and morphological features of the synthesized materials, respectively. The presence of fluorine is also supported by energy-dispersive X-ray spectroscopy. The electrochemical properties are evaluated by means of Li/Li2CoPO4F half-cell configurations in both potentiostatic and galvanostatic modes. The Li/Li2CoPO4F cell delivers an initial discharge capacity of 132 mA h g−1 at a current density of 0.1 mA cm−2 between 2.0 and 5.1 V at room temperature. Due to the higher operating potential of the Co2+/3+ couple in the fluorophosphate matrix, this cell shows a capacity retention of only 53% after 20 cycles, still the material delivered 108 mA h g−1 at a high current rate of 1 C. Cyclic voltammetric studies corroborate the insertion and extraction of Li+ ions by a single phase reaction mechanism during cycling.
URI: https://hdl.handle.net/10356/106593
http://hdl.handle.net/10220/11020
DOI: 10.1039/C2CP41624G
Rights: © 2012 The Owner Societies.
Fulltext Permission: none
Fulltext Availability: No Fulltext
Appears in Collections:ERI@N Journal Articles

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