Shape-controlled synthesis of TiO₂hollow structures and their application in lithium batteries

Abstract

In this work, various TiO 2 hollow structures, such as pseudocubes, ellipsoids, capsules and peanuts, have been synthesized through the following process: hydrothermal deposition of anatase TiO 2 on monodisperse Fe 2 O 3 microscale particles with different shapes (pseudocubes, ellipsoids, capsules and peanuts) and the sequential acid-dissolution of the Fe 2 O 3 cores. The morphologies of these TiO 2 hollow structures are similar to their Fe 2 O 3 templates. When all the obtained hollow TiO 2 structures are used as the anode material for lithium-ion batteries, they show higher discharge capacity as compared to TiO 2 solid microspheres.

Synthesis of sandwich-like TiO2@C composite hollow spheres with high rate capability and stability for lithium-ion batteries

“…The TiO 2 -HS@C display good capacity retentions at different C rates, which is better than TiO 2 -HS. Furthermore, TiO 2 -HS@C show better electrochemical performance compared to other TiO 2 hollow structures reported recently [18,19,39,40]. Therefore, with the rational carbon-coating, TiO 2 -HS@C exhibit better rate capability and stability, which can be ascribed to the novel sandwich-like hierarchical structures.…”

One-pot template-free preparation of mesoporous TiO2 hollow spheres and their photocatalytic activity

“…Therefore, a series of methods was successfully developed, such as hydrothermal method [9], solvothermal method [10] and silica-protected calcination [11]. In these preparation processes, the hard (SiO 2 spheres [12], Fe 2 O 3 particles [13], carbon spheres [14], polymer latex spheres [15], etc.) and soft sacrificial templates (vesicles [16], emulsions [17], and micelles [18]) are usually required, which lead to high cost, complex steps, long reaction time, stringent conditions and pollutants generated from the elimination of the templates.…”

Facile synthesis of low cost anatase titania nanotubes and its electrochemical performance

“…However, its wide use is hampered by slow transport kinetics for both electronic and Li + ions conductivities preventing it far from excellent electrochemical performer [17−19]. A number of corrective measures has been proposed that can enhance the electronic and ion transport such as carbon coating, doping with metals and the design of nonstructural forms [20][21][22]. Reducing the particle size in nanoscale could shorten lithium ion diffusion distance and enhances both the electrode capability of Li + storage and kinetics; thus the rate capability and electrochemical performance of electrode material can be improved [23].…”