The Effect of Carbon Coating on the Electrochemical Performance of Nanosized Li2FeSiO4 Cathode Materials |
| Y. Wang, D. Su and G. Wang
Research Centre for Clean Energy Technology, School of Chemistry and Forensic Science, University of Technology, Sydney, City Campus, Broadway, Sydney, NSW 2007, Australia |
| Full Text PDF |
| 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. |
DOI: 10.12693/APhysPolA.123.279 PACS numbers: 61.05.cp, 61.46.Hk, 68.37.-d |