High-stable and High-capacity Sn/SnO₂@C as Anode of Lithium-ion Batteries

We synthesized size-controllable nanoparticles with homogeneous distribution of carbon and Sn/SnO₂ by a solvothermal method. The effects of different carbon content and hydrothermal time on the composition, morphology and electrochemical properties of the materials were investigated. Compared with bulk materials, nanoparticles materials not only have high specific surface area, but also can provide abundant reaction sites, thus enhancing the electrochemical activity of electrode materials. More importantly, the optimized microspheres Sn/8C-24 delivers a superior electrochemical performance, achieving a specific discharge capacity of 700.4 mAh·g⁻¹ after 150 cycles at 0.5 A·g⁻¹, and the Coulomb efficiency reaches 98.65%, which is promising for anode of LIBs.