CoFe2O4-graphene nanocomposites (CoFe2O4-GNSs) have been synthesized through an ultrasonic method combined with calcination process. The nanocomposite calcinated at 350 °C shows better rate capabilities, e.g., 696, 495, 308, and 254 mAh g-1 at 1, 2, 5, and 10 A g-1, respectively.
Keywords: Anode materials; Cobalt ferrite; Graphene; Lithium ion battery.