Carbon-doped Li2SnO3/graphene as an anode material for lithium-ion batteries
Abstract The carbon-doped Li 2 SnO 3 /graphene composites for lithium-ion batteries were synthesized by the hydrothermal route. The structure, morphology and electrochemical properties of the composites were detected by means of XRD, SEM, TEM, Raman, TGA and electrochemical measurements. The Li 2 SnO 3 nanoparticles are surrounded by graphene sheets (GNS) and amorphous carbon layers. The carbon-doped Li 2 SnO 3 /graphene materials exhibit good electrochemical performance with high capacity and good cycling stability (736.3 mA h/g after 50 cycles at 60 mA/g).The presence of graphene sheets and carbon layer can alleviate the effects of volume changes, keep the structure stable and increase the conductivity. Conclusively, The C/Li 2 SnO 3 /GNS composites exhibit better electrochemical properties than GNS/Li 2 SnO 3 and Li 2 SnO 3 .