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Enhancement of the capacitance in TiO2 nanotubes through controlled introduction of oxygen vacancies
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.
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Citations
Cited by
Qu, Q., Yang, S., & Feng, X. (2011) · Advanced Materials · doi:10.1002/adma.201103042 · Cited by 577
Zhong, J.-H., Wang, A.-L., Li, G.-R., Wang, J.-W., Ou, Y.-N., & Tong, Y.-X. (2012) · Journal of Materials Chemistry · doi:10.1039/c2jm15863a · Cited by 510
Zhang, Z., Xiao, F., Guo, Y., Wang, S., & Liu, Y. (2013) · ACS Applied Materials & Interfaces · doi:10.1021/am303299r · Cited by 425
The formation and detection techniques of oxygen vacancies in titanium oxide-based nanostructures
Sarkar, A., & Khan, G. G. (2019) · Nanoscale · doi:10.1039/c8nr09666j · Cited by 425
Shi, X., Zhang, Y., Liu, X., Jin, H., Lv, H., He, S., Hao, H., & Li, C. (2019) · Catalysts · doi:10.3390/catal9050426 · Cited by 23
Metadata
- Authors
- Salari, M., Konstantinov, K., & Liu, H. K.
- Venue
- Journal of Materials Chemistry
- Publisher
- Royal Society of Chemistry (RSC)
- Published
- 2011
- Volume
- 21
- Issue
- 13
- Pages
- 5128
- ISSN
- 0959-9428 (ISSN-L)
- 1364-5501
- OpenAlex
- W2167895445
- Cited by
- 319
- References
- 0
- FWCI
- 8.58
- Type
- journal article
- Language
- en
- Open access
- closed
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- Salari, M., Konstantinov, K., & Liu, H. K. (2011). Enhancement of the capacitance in TiO2 nanotubes through controlled introduction of oxygen vacancies. Journal of Materials Chemistry. https://doi.org/10.1039/c0jm04085a
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