The Effect Of Carbon Coating On The Electrochemical Performance Of Nanosized Li2FeSiO4 Cathode Materials

Polish Acad Sciences Inst Physics
Publication Type:
Journal Article
Acta Physica Polonica A, 2013, 123 (2), pp. 279 - 282
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Carbon-coated Li2FeSiO4/C cathode materials have been synthesized through a modified ball-milling process. The physical characterizations of Li2FeSiO4 were conducted by using X-ray powder diffraction, field-emission scanning electron microscopy and transmission electron microscopy techniques. Field-emission scanning electron microscopy and transmission electron microscopy images revealed that Li2FeSiO4/C consists of nanosized particles coated with an amorphous carbon layer. The electrochemical performances of Li2FeSiO4/C cathode materials were evaluated through fully assembled lithium batteries via cyclic voltammetry, charge/discharge test and electrochemical impedance spectroscopy. The Li2FeSiO4/C cathode materials showed a much improved electrochemical performance in terms of higher specific capacity, better cycling performance and less charge transfer resistance than that of the pristine Li2FeSiO4.
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