Synthesis of Fe3O4/C composite microspheres for a high performance lithium-ion battery anode
- Authors
- Jung, Byung-Young; Lim, Hyung-Seok; Sun, Yang Kook; Suh, Kyung-Do
- Issue Date
- Dec-2013
- Publisher
- ELSEVIER
- Keywords
- Iron oxide/carbon composite; Alternative anode materials; High content of magnetite; Particle morphology; Lithium-ion batteries
- Citation
- JOURNAL OF POWER SOURCES, v.244, pp.177 - 182
- Indexed
- SCIE
SCOPUS
- Journal Title
- JOURNAL OF POWER SOURCES
- Volume
- 244
- Start Page
- 177
- End Page
- 182
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/26598
- DOI
- 10.1016/j.jpowsour.2013.02.035
- ISSN
- 0378-7753
- 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.
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