Abstract：To obtain the anode materials with good electrochemical performance for lithium ion batteries liberally and conveniently, the graphene coated Mn₃O₄ nano-composites was prepared by the method of one step calcination. The composites were characterized by XRD, SEM and TEM, and the electrochemical detection was conducted. The results show that the Mn₃O₄ particles are well anchored in the graphene. The graphene coated Mn₃O₄ nano-composites has a good electrochemical performance. The initial discharge capacity of graphene coated Mn₃O₄ nano-composites with carbon mass fraction of 13% reaches 859.7 m A·h/g. The discharge cap acity maintains at 380 m A·h/g even with a high current density of 1 600 m A/g. The materials also display no capacity loss after 100 cycles.

Keywords: calcination method; graphene; nano-composites