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Issue 12, 2015
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Chrysanthemum-like TiO2 nanostructures with exceptional reversible capacity and high coulombic efficiency for lithium storage

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Abstract

The rational design of hierarchically structured materials is of great significance for developing energy-storage devices. Herein, a novel and uniform chrysanthemum-like TiO2 nanostructure built by well-defined surface-folded nanorods (CLNR-TiO2) has been fabricated by a facile, effective and template-free synthetic method. By only changing the solvent in the reaction another two different morphologies have been obtained, including flower-like structures built by nanoplates (FLNP-TiO2) and microspheres (Microsphere-TiO2). As chrysanthemum-like nanostructures allow efficient Li+ ion diffusion, as well as have better structural stability, CLNR-TiO2 exhibits the best lithium storage performances among the three samples. A superior capacity up to 309.3 mA h g−1 is achieved at a current rate of 0.5 C (1 C = 170 mA g−1) for the first cycle with a high coulombic efficiency of 93.4% and it is significant for practical applications. At a high current rate of 5 C, a high reversible capacity of 198.3 mA h g−1 is obtained in 100 cycles (92% of capacity retention) with excellent rate capacity, high coulombic efficiency and good cycling stability.

Graphical abstract: Chrysanthemum-like TiO2 nanostructures with exceptional reversible capacity and high coulombic efficiency for lithium storage

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Supplementary files

Article information


Submitted
24 Jan 2015
Accepted
16 Feb 2015
First published
16 Feb 2015

J. Mater. Chem. A, 2015,3, 6402-6407
Article type
Paper

Chrysanthemum-like TiO2 nanostructures with exceptional reversible capacity and high coulombic efficiency for lithium storage

L. Wang, Z. Nie, C. Cao, Y. Zhu and S. Khalid, J. Mater. Chem. A, 2015, 3, 6402 DOI: 10.1039/C5TA00603A

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