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Graphene with a single layer of carbon atoms densely packed in a honeycomb crystal lattice is one of attractive materials for the intercalation of lithium ion, but it has low volumetric capacity owing to low tap density. We report a method for in situ growth of SnO2 on graphene nanosheets (SGN) as anode materials for rechargeable lithium batteries. The results indicated that the SnO2 nanoparticles with size in the range of 5-10 nm and a polycrystalline structure are homogeneously supported on graphene nanosheets. The charge and discharge capacities of SGN attained to 1559.7 and 779.7 mAh/g in the first cycle at a current density of 300 mA/g. The specific discharge capacities remained at 620 mAh·g-1 in the 200th cycle. The SGN exhibits a superior Li-storage performance with good cycle life and high capacity. ©The Electrochemical Society.

In Situ Growth of SnO2 on Graphene Nanosheets as Advanced Anode Materials for Rechargeable Lithium Batteries

In Situ Growth of SnO₂ on Graphene Nanosheets as Advanced Anode Materials for Rechargeable Lithium Batteries