Synthesis of Fe3O4/C composite microspheres for a high performance lithium-ion battery anode

Title
Synthesis of Fe3O4/C composite microspheres for a high performance lithium-ion battery anode
Other Titles
C composite microspheres for a high performance lithium-ion battery anode
Author
선양국
Keywords
Iron oxide/carbon composite; Alternative anode materials; High content of magnetite; Particle morphology; Lithium-ion batteries
Issue Date
2013-12
Publisher
Elsevier B.V.
Citation
Journal of Power Sources 2013, 244, 177-182
Abstract
Fe3O4/carbon (Fe3O4/C) composite microspheres with a high content of Fe3O4 nanoparticles as an active material are prepared by suspension polymerization and heat treatment. A significant difference is observed in the morphology of the Fe3O4/C composite microspheres with the introduction of different amounts of Fe3O4 nanoparticles. The morphological and structural differences of the Fe3O4/C composite microspheres are characterized by focused ion beam cross-section, scanning electron microscopy, transmission electron microscopy, and X-ray diffraction analysis. Thermogravimetric analysis is conducted to measure the amount of Fe3O4 nanoparticles introduced into a carbon matrix. We fix two samples with Fe3O4 contents of 72 wt.% and 98 wt.%, respectively. Fe3O4/C composite microspheres containing 72 wt.% Fe3O4 nanoparticles show much higher capacity retention with an excellent columbic efficiency of 99% at every cycle in comparison with that of the Fe3O4/C composite microspheres containing 98 wt.% Fe3O4 nanoparticles when used as anodes for LIBs. These results indicate that the particle morphology and weight ratio of incorporated Fe3O4 to carbon matrix affects the electrochemical performance of Li-ion cells.
URI
http://www.sciencedirect.com/science/article/pii/S0378775313003005?via%3Dihubhttp://hdl.handle.net/20.500.11754/45339
ISSN
0378-7753
DOI
10.1016/j.jpowsour.2013.02.035
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > ENERGY ENGINEERING(에너지공학과) > Articles
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