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Issue 22, 2016
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Dandelion-shaped TiO2/multi-layer graphene composed of TiO2(B) fibrils and anatase TiO2 pappi utilizing triphase boundaries for lithium storage

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Abstract

A three-dimensional dandelion-shaped TiO2/multi-layer graphene compound (TiO2/MLG) composed of TiO2(B) fibrils and anatase pappus structures has been synthesized as a potential anode material for Li storage. Electron microscopy indicates that the composite contains triphase boundaries between anatase, TiO2(B) and graphene, which are responsible for the enhancement of energy storage and the decrease of electrode polarization. Cyclic voltammetric investigations indicate that both Li+ insertion and pseudocapacitance contribute to charge storage. Ultrahigh specific capacities of 243 and 182 mA h g−1 have been obtained at 0.1 and 1 A g−1, respectively. Moreover, the excellent capacity retention can reach 99.6% after 100 cycles with almost 100% coulombic efficiency at 0.1 A g−1. The importance of the triphase boundary in enhancing the storage of charge and transport of Li+ is demonstrated.

Graphical abstract: Dandelion-shaped TiO2/multi-layer graphene composed of TiO2(B) fibrils and anatase TiO2 pappi utilizing triphase boundaries for lithium storage

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Supplementary files

Article information


Submitted
26 Mar 2016
Accepted
03 May 2016
First published
04 May 2016

This article is Open Access

J. Mater. Chem. A, 2016,4, 8762-8768
Article type
Paper
Author version available

Dandelion-shaped TiO2/multi-layer graphene composed of TiO2(B) fibrils and anatase TiO2 pappi utilizing triphase boundaries for lithium storage

W. Song, J. Chen, X. Ji, X. Zhang, F. Xie and D. J. Riley, J. Mater. Chem. A, 2016, 4, 8762
DOI: 10.1039/C6TA02548J

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