Improved electrochemical performance of stannic oxide@C composites by regulating the charge transfer kinetics at the electrode/electrolyte interphase

Although the traditional graphite anode materials have stable cycle performance, it has low capacity which limits its energy density. Therefore, it is urgent to prepare new anode materials. During the past decades, the metal oxides are considered as the most promising anode materials due to their high specific capacity and energy density. However, the metal oxide anode suffers from poor cycling stability, which is caused by the unstable structure and poor electrode/electrolyte interphase. Herein, we design the stannic oxide@C composites via hydrothermal reaction method and used as anode materials for the lithium-ion batteries. Due to the improved charge transfer kinetics at the electrode/electrolyte interphase, the as-prepared stannic oxide@C composites show high specific capacity and stable cycling performance at the high current densities.