Hierarchical nanorod-based TiO2 microspheres for superior electrochemical energy storage

We report the synthesis of rutile-type TiO2 microspheres by rapid hydrothermal treatment of peroxo titanic acid. Inspired by the unique shape with interconnected networks, the TiO2 microspheres were used as anode materials for lithium batteries, and the cells exhibited initial discharge capacities up to 180 mA h g−1 at 0.2 C rate. The TiO2 microspheres show superior rate capacity with high power density and cycling stability owing to their unique hierarchical structural features composed small attached nanorods.284