Shape-controlled synthesis of TiO2 hollow structures and their application in lithium batteries

Abstract

In this work, various TiO₂ hollow structures, such as pseudocubes, ellipsoids, capsules and peanuts, have been synthesized through the following process: hydrothermal deposition of anatase TiO₂ on monodisperse Fe₂O₃ microscale particles with different shapes (pseudocubes, ellipsoids, capsules and peanuts) and the sequential acid-dissolution of the Fe₂O₃ cores. The morphologies of these TiO₂ hollow structures are similar to their Fe₂O₃ templates. When all the obtained hollow TiO₂ structures are used as the anode material for lithium-ion batteries, they show higher discharge capacity as compared to TiO₂ solid microspheres.