Journal
JOURNAL OF POWER SOURCES
Volume 223, Issue -, Pages 119-124Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2012.09.033
Keywords
Lithium ion battery; Intercalation compound; Interaction; Magnetite; Expanded graphite
Funding
- National Basic Research Program of China [2009CB220100]
- National High Technology Research and Development Program of China [2009AA035200]
- A* Star Singapore-China Joint Research Programme [2012DFG52130]
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Magnetite (Fe3O4)/expanded graphite (EG) composite material is prepared through the oxidation progress of ferrocene-graphite intercalation compound in acetone solution. The reactions occur in this system and lead to in-situ synthesis of the composite with nanosized magnetite and expanded graphite. Due to the lithium insertion/extraction experiment, the Fe3O4/EG composite material shows high reversible capacities (ca. 720 mA h g(-1) at 120 mA g(-1) charge current) and excellent rate performances (ca. 630 mA h g(-1) at 600 rnA g(-1), 420 mA he at 6000 mA g(-1) and 360 mA h g(-1) at 9000 mA g(-1) charge current). Owning to the strong interaction between Fe3O4 and EG from in-situ synthesis, it is demonstrated that these properties of this novel Fe3O4/EG composite material will be an idea candidate for the negative electrode material of high-current lithium ion battery. (C) 2012 Elsevier B.V. All rights reserved.
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