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

Jin Yi1), Yan-lin Liu1), Yuan Wang1), Xiao-ping Li1,2,3), She-jun Hu1,2,3), and Wei-shan Li1,2,3) 1) School of Chemistry and Environment, South China Normal University, Guangzhou 510006, China 2) Key Laboratory of Electrochemical Technology on Energy Storage and Power Generation of Guangdong Higher Education Institutes, Guangzhou 510006, China 3) Engineering Research Center of Materials and Technology for Electrochemical Energy Storage, Ministry of Education, Guangzhou 510006, China

摘 要：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.

关键词：