High capacity three-dimensional ordered macroporous CoFe2O4 as anode material for lithium ion batteries

✍ Scribed by Z.H. Li; T.P. Zhao; X.Y. Zhan; D.S. Gao; Q.Z. Xiao; G.T. Lei

• Publisher: Elsevier Science
• Year: 2010
• Tongue: English
• Weight: 788 KB
• Volume: 55
• Category: Article
• ISSN: 0013-4686
• DOI: 10.1016/j.electacta.2010.03.015

✦ Synopsis

A three-dimensional ordered macroporous (3DOM) cobalt ferrite (CoFe 2 O 4 ) was prepared using polystyrene (PS) colloidal crystal template. The scanning electron microscopy (SEM) and the transmission electron microscopy (TEM) micrographs showed that the as-prepared CoFe 2 O 4 material had a typical 3DOM structure, which was constructed with about 130 nm-sized macropores and 10-20 nm-sized walls. The obtained CoFe 2 O 4 material had a specific surface area of 66.67 m 2 g -1 , and could deliver a relatively high capacity of 702 mAh g -1 (about double that of graphite) at a current density of 0.2 mA cm -2 after 30 cycles. Owing to the 3DOM nanoarchitecture, the as-prepared CoFe 2 O 4 electrode exhibited a good rate performance. The results suggest a promising application of the 3DOM CoFe 2 O 4 as anode material for lithium ion batteries.