Synthesis of dandelion-like TiO₂ microspheres as anode materials for lithium ion batteries with enhanced rate capacity and cyclic performances

Abstract

Dandelion-like TiO₂ microspheres consisting of numerous rutile single-crystalline nanorods were synthesized for the first time by a hydrothermal method. Their crystal structure, morphology and electrochemical properties were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and galvanostatic charge and discharge tests. The results show that the synthesized TiO₂ microspheres exhibit good rate and cycle performances as anode materials of lithium ion batteries. It can be found that the dandelion-like structure provides a larger specific surface area and the single-crystalline nanorod provides a stable structure and fast pathways for electron and lithium ion transport, which contribute to the rate and cycle performances of the battery.

Keywords

titanium dioxide / microspheres / nanorods / anodes / lithium batteries

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