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Hierarchical rutile TiO2 microspheres assembled by nanorods with nanocavities and their lithium-ion storage properties

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Abstract

Unique hierarchical rutile TiO2 microspheres assembled by nanorods with nanocavities were successfully synthesized through mesoscale assembly in the tetrabutyl titanate-hydrochloric acid system followed by subsequently calcinating in air. In contrast to the classical mechanism of atom-/molecule-mediated growth of a single crystal, the particle-mediated growth and assembly mechanism was summarized as nonclassical crystallization. The particle-based crystallization pathways lead to single crystals with nanocavities via mesoscopic transformation and anti-nucleation process. The electrochemical properties were investigated by constant current discharge-charge tests and electrochemical impedance techniques. This microsphere-shaped rutile TiO2 with nanocavities exhibits excellent rate capacities (151 mAh g−1 at 2 C) and better cyclic performance than that of rutile TiO2 mesocrystals precursor at high rate.

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Funding

This project was supported by the National Natural Science Foundation of China (Project No. 51602275, Project No. 51762041), Fund for One Hundred Young Doctor Program of Xinjiang Uygur Autonomous Region, as well as the Science and Technology Foundation of Xinjiang Uyghur Autonomous Region Bureau of Quality and Technical Supervision (Project No. 201609), and the Natural Science Foundation for Young Scholars Program of Xinjiang Uygur Autonomous Region (2016D01B050).

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Correspondence to Sudong Yang.

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The authors declare that they have no conflict of interest.

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Chen, L., Yang, S. Hierarchical rutile TiO2 microspheres assembled by nanorods with nanocavities and their lithium-ion storage properties. J Nanopart Res 20, 32 (2018). https://doi.org/10.1007/s11051-017-4112-3

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  • DOI: https://doi.org/10.1007/s11051-017-4112-3

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