High Volumetric Capacity of Hollow Structured SnO2@Si Nanospheres for Lithium-Ion Batteries

A novel-design of hollow structured SnO2@Si nanospheres was presented, which not Only demonstrates high volumetric capacity as anode of LIBs, but also prevents aggregation of Sn and confines :solid electrolyte interphase thickening. An impressive volumetric-specific capacity of 1030 mAh cm(-3) was maintained after 500 cycles. The electrochemical impedance spectroscopy and differential scanning calorimetry indicated that solid-electrolyte interphase can be confined in pores of as-prepared hollow structured SnO2@Si.