Jump to main content
Jump to site search
Access to RSC content Close the message box

Continue to access RSC content when you are not at your institution. Follow our step-by-step guide.


Issue 13, 2011
Previous Article Next Article

Enhancement of the capacitance in TiO2nanotubes through controlled introduction of oxygen vacancies

Author affiliations

Abstract

The many applications of high energy storage devices have forged an increasing interest in research areas related to electrochemical capacitors. Here, in this work, we present a facile method for the fabrication of self-organized titania nanotubes grown by anodic oxidation of titanium foil with different subsequent heat-treatment regimes for use as binder-free working electrodes in supercapacitor applications. The capacitance of these highly ordered titania nanotubes, when exposed to a reductive atmosphere during annealing, was determined to be well above 900 µF cm−2, confirming that the capacitance contribution was pseudocapacitive in nature. The behaviour of oxygen depleted titania in the anatase to rutile (A → R) phase transformation and also in electrochemical charge storage has been studied in detail. It was found that upon the reduction of Ti4+ to Ti3+, with oxygen depletion of the structure, the A → R phase transformation was promoted. In addition, the fabricated electrodes showed highly reversible charge–discharge stability.

Graphical abstract: Enhancement of the capacitance in TiO2 nanotubes through controlled introduction of oxygen vacancies

Back to tab navigation

Article information


Submitted
25 Nov 2010
Accepted
02 Feb 2011
First published
22 Feb 2011

J. Mater. Chem., 2011,21, 5128-5133
Article type
Paper

Enhancement of the capacitance in TiO2 nanotubes through controlled introduction of oxygen vacancies

M. Salari, K. Konstantinov and H. K. Liu, J. Mater. Chem., 2011, 21, 5128
DOI: 10.1039/C0JM04085A

Search articles by author

Spotlight

Advertisements