Facile synthesis of rGO/SnO2 composite anodes for lithium ion batteries

Abstract

The reduced graphene oxide/SnO₂ (rGO/SnO₂) composite was facilely synthesized via a modified colloidal coagulation method and a subsequent reduction. As an anode for lithium ion batteries, it delivers a high reversible capacity of 795 mA h g⁻¹ in the 600th cycle at a current density of 1000 mA g⁻¹. The excellent electrochemical performances are mainly due to its morphology stability and the reversible reaction between the formed Li₂O and Sn to yield SnO₂, as confirmed by XPS and TEM characterization after 200 cycles.