Ultrathin TiO2 rutile nanowires enable reversible Mg-ion intercalation

[Display omitted] •Novel structures for multi-valent ion battery.•The hydrothermal production of ultrathin TiO2 nanowires.•Preferable intercalation of Mg2+ ion into TiO2 rutile nanowires.•The importance of nanostructure engineering to energy storage. Crystalline ultrathin TiO2 nanowires with oriente...

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Bibliographic Details
Published in:Materials letters 2019-11, Vol.254, p.357-360
Main Authors: Truong, Quang Duc, Le, Thanh Son, Hoa, Thu H.
Format: Article
Language:English
Subjects:
Crystal structure
Crystallinity
Electrode materials
Energy storage
Hierarchical microspheres
Intercalation
Magnesium
Magnesium battery
Materials science
Microspheres
Nanowires
Reaction kinetics
Single crystals
Storage capacity
Titanium dioxide
Ultrathin TiO2 nanowires
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Summary:[Display omitted] •Novel structures for multi-valent ion battery.•The hydrothermal production of ultrathin TiO2 nanowires.•Preferable intercalation of Mg2+ ion into TiO2 rutile nanowires.•The importance of nanostructure engineering to energy storage. Crystalline ultrathin TiO2 nanowires with oriented configurations are promising for high-performance energy storage and conversion devices. In this work, we use hierarchical microspheres constructed from radially oriented single-crystalline TiO2 nanowires as electrode materials for reversible Mg-ion intercalation. The obtained mesoporous TiO2 nanowires deliver a capacity of 118 mA h g−1 at 20 mA/g current rate. The ultra small size of TiO2 nanocrystalline is beneficial for reaction kinetics, enhance the bulk intercalation of Mg ions, which remarkably increases storage capacity of TiO2. The discharge capacity over 100 cycles remains 105.2 mA h g−1, demonstrating the superiority of this material structure and its potential in magnesium ion batteries.
ISSN:0167-577X
1873-4979
DOI:10.1016/j.matlet.2019.07.109