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Highly Ordered TiO Nanotube Arrays with Engineered Electrochemical Energy Storage Performances

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Publisher MDPI
Date 2021 Jan 26
PMID 33494325
Citations 7
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Abstract

Nanoscale engineering of regular structured materials is immensely demanded in various scientific areas. In this work, vertically oriented TiO nanotube arrays were grown by self-organizing electrochemical anodization. The effects of different fluoride ion concentrations (0.2 and 0.5 wt% NHF) and different anodization times (2, 5, 10 and 20 h) on the morphology of nanotubes were systematically studied in an organic electrolyte (glycol). The growth mechanisms of amorphous and anatase TiO nanotubes were also studied. Under optimized conditions, we obtained TiO nanotubes with tube diameters of 70-160 nm and tube lengths of 6.5-45 μm. Serving as free-standing and binder-free electrodes, the kinetic, capacity, and stability performances of TiO nanotubes were tested as lithium-ion battery anodes. This work provides a facile strategy for constructing self-organized materials with optimized functionalities for applications.

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