Graphene‐Supported Ce – SnS 2 Nanocomposite as Anode Material for Lithium‐Ion Batteries

A graphene‐supported Ce – SnS 2 ( Ce – SnS 2 /graphene) nanocomposite has been synthesized via a hydrothermal route. Structure, morphology, and electrochemical properties of the composites were studied by means of XRD , SEM , TEM , Raman, XPS , TGA , and electrochemical measurements. The Ce – SnS 2 crystal particles with a flower‐like structure were distributed on the graphene sheets ( GNS ). The particle sizes of each petal are in the range 50–100 nm with clear lattice fringes. The atomic ratio of Sn , S , Ce , C , and O is estimated to be 1:2:0.05:3.11:0.64 and the content of Ce – SnS 2 composite is 80 wt.% in the as‐synthesized sample. The Ce – SnS 2 /graphene composite exhibits high initial discharge capacity (1638.3 mAh/g at 0.5 C), high capacity retention (707 mAh/g at 0.5 C after 50 cycles), and good rate capability due to the synergy effect between Ce – SnS 2 nanoparticles and graphene nanosheets. The superior performance is ascribed to the presence of graphene keeping the structure stable.