Synthesis of tin(IV) oxide@reduced graphene oxide nanocomposites with superior electrochemical behaviors for lithium-ions batteries

Tin(IV) oxide@reduced graphene oxide nanocomposites are synthesized using a simple hydrothermal method. The structural and morphological characterizations indicate that the SnO₂ nanoparticles fully and homogeneously anchor on both sides of cross-linked reduced graphene oxide. As an anode material for lithium-ion batteries, the synergistic interaction between the SnO₂ nanoparticles and reduced graphene oxide contributes to good electrochemical behaviors, which enhance the cycling performance and rate capability. For a half-cell, the SnO₂@reduced graphene oxide nanocomposites as an anode material exhibits a high reversible capacity of 1149 mAh g⁻¹ at a current density of 0.2 A g⁻¹, and a good capacity retention of 67.2% after 130 cycles. For a full-cell, it exhibits a capacity of 648 mAh g⁻¹ at a current density of 0.2 A g⁻¹ after 200 cycles, and the cycling retention of capacity reached 63.5%. The excellent storage capability and cycling performance of lithium-ion batteries make the composite a promising anode material in the practical application of lithium-ion batteries.