Enhanced rate performance and cyclic stability of Fe3O4–graphene nanocomposites for Li ion battery anodes

Abstract

Monodispersed Fe₃O₄ nanoparticles of size ∼10 nm were processed by a simple ultrasonic assisted co-precipitation method, mechanically mixed with graphene oxide, and thermally reduced to form a magnetite–graphene composite. Electrochemical characterization of the Fe₃O₄–graphene nanocomposites showed excellent capacity in excess of 1200 mA h g⁻¹, and exceptional stability during high current cycling for at least 1000 cycles.