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
- 서경도
- 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, v. 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://hdl.handle.net/20.500.11754/45318https://www.sciencedirect.com/science/article/pii/S0378775313003005?via%3Dihub
- ISSN
- 0378-7753
- DOI
- 10.1016/j.jpowsour.2013.02.035
- Appears in Collections:
- COLLEGE OF ENGINEERING[S](공과대학) > CHEMICAL ENGINEERING(화학공학과) > Articles
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