Electrochemical lithiation and delithiation of FeSb2 anodes for lithium-ion batteries

Iron antimonide, FeSb2, has been prepared by levitation melting. The electrochemical cycling behaviors of FeSb2 were evaluated using lithium-ion model. cell Li/LiPF6(EC + DMC)/FeSb2, It was found that the reversible capacity of FeSb2 in the first cycle reached 507 mA h g(-1), and a reversible capacity of about 282 mA It g(-1) was still maintained after 15 cycles. In our present work, we also found that the FeSb2/mesocarbon microbeads (MCMB) composite material possessed higher initial reversible capacity and better cycle life than pure FeSb2, which made it suitable for use as anode material in rechargeable lithium-ion batteries. (C) 2003 Elsevier Science B.V. All rights reserved.