Dandelion-shape TiO2/Multi-layer Graphene Composed of TiO2(B) Fibrils and Anatase TiO2 Pappi Utilizing Triphase Boundaries for Lithium Storage
File(s)
Published version
Accepted version
Author(s)
Type
Journal Article
Abstract
Three‐dimensional dandelion‐shape TiO2/Multi‐layer graphene compound (TiO2/MLG) composed of TiO2(B) fibrils and
anatase pappi structures has been synthesized as potential anode material for Li storage. Electronmicroscopy 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
mAh 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.
anatase pappi structures has been synthesized as potential anode material for Li storage. Electronmicroscopy 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
mAh 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.
Date Issued
2016-05-03
Date Acceptance
2016-05-03
Citation
Journal of Materials Chemistry A, 2016, 4, pp.8762-8768
ISSN
2050-7496
Publisher
Royal Society of Chemistry
Start Page
8762
End Page
8768
Journal / Book Title
Journal of Materials Chemistry A
Volume
4
Copyright Statement
This article is licensed under a Creative Commons Attribution 3.0 Unported Licence.
Publication Status
Published