Hydrothermal solid-gas route to TiO 2 nanoparticles/nanotube arrays for high-performance supercapacitors

Fan, Haowen; Zhang, He; Luo, Xuenong; Liao, Ming‐Feng; Zhu, Xufei; Ma, Jing; Song, Ye

doi:10.1016/j.jpowsour.2017.05.009

Cited by 43 publications

(18 citation statements)

References 42 publications

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“…overcome the low ion diffusion coefficient [20]; improving the electrical properties of TiO 2 by metallic and nonmetallic doping [13]. The doping of TiO 2 with non-metals (N and H) and transition metals (Ni 3+ , Zr 4+ , W 6+ , Ce 4+ , V 5+ , Nb 5+ , Fe 3+ ) is considered an efficient method to improve the electrical conductivity of TiO 2 [21][22][23].…”

Section: Accepted Manuscriptmentioning

confidence: 99%

Hydrothermal syntheses of tungsten doped TiO2 and TiO2/WO3 composite using metal oxide precursors for charge storage applications

Pal

Vijayan

Krishnan

et al. 2018

Journal of Alloys and Compounds

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Section: Accepted Manuscriptmentioning

confidence: 99%

Hydrothermal syntheses of tungsten doped TiO2 and TiO2/WO3 composite using metal oxide precursors for charge storage applications

Pal

Vijayan

Krishnan

et al. 2018

Journal of Alloys and Compounds

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“…Although the solid–liquid WAC method is cost-effective and convenient, the full-of-water condition results in a disadvantage: TNT films may detach because of the dissolution of the bottom layer under the NTs. To circumvent this problem, a solid–gas method, in which water is gaseous, is proposed [44, 53, 54].…”

Section: Methods and Mechanismsmentioning

confidence: 99%

“…Treatment temperature Regarding the solid–liquid method, its high temperature (> 100 °C) can easily lead to the collapse of TNT films [53]. In contrast, the TNT films are relatively robust under solid–gas treatment.…”

Section: Fundamental Propertiesmentioning

confidence: 99%

“…Although the anatase phase can be obtained using the WAC method, the crystallinity is not as high as that of the annealed products. Fan et al first crystallized amorphous TNTs by the solid–gas method, and then the prepared products were further annealed at 450 °C [53]. The intensity of the dominant (101) peak was significantly larger after annealing, indicating that the previously obtained TNTs were partially crystallized.…”

Section: Fundamental Propertiesmentioning

confidence: 99%

“…Fan et al first used the hydrothermal solid–gas (HSG) method to crystallize the as-anodized TNTs and adjust their morphology; the HSG-treated sample was then annealed to yield fully crystallized products [53]. As shown in Fig.…”

Section: Applicationsmentioning

confidence: 99%

See 2 more Smart Citations

Review of Water-Assisted Crystallization for TiO2 Nanotubes

et al. 2018

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TiO2 nanotubes (TNTs) have drawn tremendous attention owing to their unique architectural and physical properties. Anodizing of titanium foil has proven to be the most efficient method to fabricate well-aligned TNTs, which, however, usually produces amorphous TNTs and needs further thermal annealing. Recently, a water-assisted crystallization strategy has been proposed and investigated by both science and engineering communities. This method is very efficient and energy saving, and it circumvents the drawbacks of thermal sintering approach. In this paper, we review the recent research progress in this kind of low-temperature crystallization approach. Here, various synthetic methods are summarized, and the mechanisms of the amorphous–crystalline transformation are analyzed. The fundamental properties and applications of the low-temperature products are also discussed. Furthermore, it is proved that the water-assisted crystallization approach is not only applicable to TNTs but also to crystallizing other metal oxides.

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Enhanced Supercapacitive Properties of Mixed Oxide Nanotubes Grown by Anodization of Ti–Fe Alloys

Jiang

et al. 2022

Energy Tech

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Like titanium metal, nanotube array films can be grown on Ti alloys by anodization in fluoride‐containing electrolytes. Further, the anodization of Ti alloys provide a unique pathway to dope TiO2 nanotubes with the alloying element. However, the details of anodization behaviors of Ti alloys and the obtained nanotubes for application in supercapacitors remain poorly understood. Herein, three Ti–Fe alloys containing different amounts of Fe element (10, 15, and 20 wt%) are fabricated by using a vacuum arc melting furnace. Their anodization behaviors are systematically investigated. The nanotube array films can be achieved on these alloys, which are composed of TiO2, Fe2O3, and Fe‐doped TiO2. Their electrochemical behaviors are completely different from both the pure TiO2 and the pure Fe2O3. The mixed oxide nanotubes on Ti–15 wt%Fe have the maximum capacitance among the three Ti–Fe alloys, which is 3.75 times higher than that of pure TiO2. Moreover, the mixed oxide electrode exhibits high rate capability and excellent cycling stability with only 5.7% loss in capacitance over 10 000 cycles. The presented results suggest that the alloy anodization is an efficient strategy for enhancing the performance of TiO2 electrode materials for supercapacitors.

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Hydrothermal solid-gas route to TiO 2 nanoparticles/nanotube arrays for high-performance supercapacitors

Cited by 43 publications

References 42 publications

Hydrothermal syntheses of tungsten doped TiO2 and TiO2/WO3 composite using metal oxide precursors for charge storage applications

Hydrothermal syntheses of tungsten doped TiO2 and TiO2/WO3 composite using metal oxide precursors for charge storage applications

Review of Water-Assisted Crystallization for TiO2 Nanotubes

Enhanced Supercapacitive Properties of Mixed Oxide Nanotubes Grown by Anodization of Ti–Fe Alloys

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