Abstract：In order to improve electrochemical performance of SnO₂lithium ion batteries anode materials, a composite material including SnO₂/graphene/porous carbon was fabricated by a simple ball-milling method.Electrochemical performance of the composite material doped with different proportion of porous carbon was studied. The results of electrochemical test show that the SnO₂/graphene/porous carbon composite material doped with 15. 79% porous carbon delivers high initial reversible capacity of 1 221 m Ah·g^-1and high cycle stability with reversible capacity of 834 m A·g^-1at 200 m Ah·g^-1after 50 cycles. It has good performance with reversible capacity of 1 221 m A·g^-1, 1 093 m A·g^-1, 993 m A·g^-1, 796 m A·g^-1and 526 m A·g^-1at current of 100 m Ah·g^-1, 200 m Ah·g^-1, 400 m Ah·g^-1, 800 m Ah·g^-1and 1 600 m Ah·g^-1, respectively. The high electrochemical performance of composite materials because of the moderate amounts of porous carbon combined with grapehene enhances the stability and conductivity of SnO₂.

Keyword：lithium ion batteries;SnO2;graphene;porous carbon;doped;composite anode materials;