Abstract
Hierarchically structured porous anatase TiO2 spheres have been fabricated by a facile chemical route. The TiO2 spheres are constructed by interconnected nanorods and possess a three-dimensional (3D) interpenetrating porous framework. When evaluated as an electrode material in lithium half-cells, such hierarchically porous TiO2 nanostructures exhibit high lithium storage capacity (225mAhg-1 at 0.5 C), excellent rate performance (141mAhg-1 at 5 C), and long cycle life (an initial Li+ storage capacity of 187mAhg-1 at 1 C and a capacity retention of ca. 95% after 100 cycles). The improved electrochemical properties of TiO2 spheres can be attributed to the synergetic effects of their unique hierarchical structure, high surface area, large and opened pore structure and interconnected 3D network. These unique structural characteristics effectively improve the mass transfer capability of electrolyte, reduce the Li ions diffusion paths and increase the electronic conduction as well as structural stability.
| Original language | English |
|---|---|
| Pages (from-to) | 844-851 |
| Journal | Chemical Engineering Journal |
| Volume | 281 |
| DOIs | |
| Publication status | Published - 1 Dec 2015 |
| Externally published | Yes |
Bibliographical note
Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].Research Keywords
- Anode materials
- Hierarchical anatase TiO2 spheres
- Interconnected nanorods
- Lithium ion batteries
