▎ 摘　　要

A manganese ferrite-graphene nanocomposite was designed and prepared by a hydrothermal method. The combination of MnFe2O4 and graphene results in much improved electrochemical performance in lithium-ion batteries. The manganese ferrite-graphene (with 30 wt.% graphene) exhibits a highest reversible capacity of 1 120 mA h g(-1) with excellent cycling stability and rate capability. The superior electrochemical performance of the manganese ferrite-graphene system can be attributed to its unique structure and the concerted effects of MnFe2O4 and graphene.