Mesoporous TiO_2-Sn@C core-shell microspheres for Li-ion batteries

摘要

Using amorphous TiO_2 microspheres as precursors, we obtain mesoporous TiO_2-Sn@C core-shell microspheres. Sn is encapsulated into a TiO_2 matrix, and carbon is coated outside. This intriguing architecture can effectively buffer volume change and structural stress, thus contributing to excellent long-term cycling stability and superior high-rate cyclabiltty.