Tunable composition of Sn/SnO2@C composites for lithium-ion batteries

Sn-based anodes are the most viable option for lithium-ion batteries (LIBs), but their widespread implementation is hindered by suboptimal kinetics properties and structural failures. Herein, an effective anode material has been synthesized for LIBs, consisting of a carbon-encapsulated matrix with particles of Sn and SnO2 (Sn/SnO2@C) composites. The synergistic effect between SnO2 and Sn significantly improves both mechanical stability and kinetic properties. Additionally, the presence of a carbon matrix enhanced electronic conductivity as well as effectively mitigating volume expansion during cycling. As expected, the Sn/SnO2@C electrode realizes decent cycle stability and impressive rate performance. The work offers a promising approach for enhancing the performance of tin-carbon composites.