Electrospun carbon–cobalt composite nanofiber as an anode material for lithium ion batteries

Carbon–cobalt (C/Co) composite nanofibers with diameters from 100 to 300 nm were prepared by electrospinning and subsequent heat treatment. They were characterized by X-ray diffraction, scanning electron microscopy, galvanostatic cell cycling and impedance spectroscopy. As a lithium storage material, these fibers exhibit excellent electrochemical properties with high reversible capacity (>750 mA h g−1) and good rate capability (578 mA h g−1 at 1 C rate). These composite fibers are a promising anode material for high-power Li-ion batteries.