The Effect of Carbon Coating on the Electrochemical Performance of Nanosized Li_2FeSiO_4 Cathode Materials

• Authors: Y. Wang , D. Su , G. Wang
• Languages of publication: EN

Abstracts

EN

Carbon-coated Li_2FeSiO_4/C cathode materials have been synthesized through a modified ball-milling process. The physical characterizations of Li_2FeSiO_4 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 Li_2FeSiO_4/C consists of nanosized particles coated with an amorphous carbon layer. The electrochemical performances of Li_2FeSiO_4/C cathode materials were evaluated through fully assembled lithium batteries via cyclic voltammetry, charge/discharge test and electrochemical impedance spectroscopy. The Li_2FeSiO_4/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 Li_2FeSiO_4.

Keywords

EN

61.05.cp; 61.46.Hk; 68.37.-d

Discipline

• 61.05.cp: X-ray diffraction
• 68.37.-d: Microscopy of surfaces, interfaces, and thin films
• 61.46.Hk: Nanocrystals

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2013
• Volume: 123
• Issue: 2
• Pages: 279-282

Dates

published

2013-02

Contributors

author

Y. Wang

• Research Centre for Clean Energy Technology, School of Chemistry and Forensic Science, University of Technology, Sydney, City Campus, Broadway, Sydney, NSW 2007, Australia

author

D. Su

• Research Centre for Clean Energy Technology, School of Chemistry and Forensic Science, University of Technology, Sydney, City Campus, Broadway, Sydney, NSW 2007, Australia

author

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

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Identifiers

DOI

10.12693/APhysPolA.123.279