The effect of thermal annealing and laser irradiation on the microstructure of vanadium oxide nanotubes

Liu, Dage; Huang, Chunming; Qiu, Jiawen; Wang, Yinyue

doi:10.1016/j.apsusc.2006.05.041

Cited by 52 publications

(40 citation statements)

References 19 publications

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“…81 The peaks observed between 1360-1560 cm −1 and 2850-2930 cm −1 , in Fig. 5b are due to C-H bending and asymmetric and symmetric stretching vibrations, respectively.…”

Section: Resultsmentioning

confidence: 91%

Polycrystalline Vanadium Oxide Nanorods: Growth, Structure and Improved Electrochemical Response as a Li-Ion Battery Cathode Material

McNulty

Buckley

O’Dwyer

2014

J. Electrochem. Soc.

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Thermally removing amine molecules that serve as chemical templates for vanadium oxide nanotubes is demonstrated to significantly improve the performance when tested as a cathode material in Li-ion battery cells. Capacity fading issues associated with blocked intercalation sites on the (010) faces of layered vanadium oxide that form the nanotubes are prevented. Thermal treatment of the nanotubes up to 600 • C is shown to cause a specific conversion from nanotubes to polycrystalline nanorods and removal of the organic template. The conversion process was monitored by thermogravimetric analysis, X-ray diffraction, transmission electron microscopy and infra-red spectroscopy. In a potential window of 4.0-1.2 V drawing 30 μA (C/30), the nanorods show improved specific capacities of ∼280 mAh g −1 with a modest 6% capacity fade compared to ∼8 mAh g −1 with 62% capacity fade for the VONTs. The improvements in specific capacity and cycling performance are due to the successful removal of amine molecules and conversion to nanorods containing nanoscale crystals. The cathode material also demonstrated enhanced energy densities (∼700 W h kg −1 ) compared to composites of the same overall weight, without conductive carbon additives or polymeric binders. In recent years there has been a significant increase in the desire and need to improve the performance and cycle life of commercial rechargeable lithium ion batteries.1-6 The advent of smart phones and tablet devices has highlighted the limitations of current generation lithium ion batteries. Rechargeable lithium ion batteries still hold great promise for use in powering electric and hybrid electric vehicles and continue to be crucial in medical and handheld portable devices. 7However it is vital that factors such as power and energy density, coulometric efficiency and rate performance are improved upon in order to meet demands for improved performance in advanced Liion batteries (∼400 Wh/kg). 1,4,[7][8][9] It is no surprise that nanostructured materials are attracting significant attention because of their novel properties and their potential applications in a wide range of devices such as biological and gas sensors, 10-18 field effect transistors 19,20 and as electrode materials for next generation high energy density batteries. 21-23 Nanostructured cathode electrodes offer improved energy storage capacity and charge-discharge kinetics, as well as better cyclic stabilities.24 This is, in part, due to the increased surface area in direct contact with the electrolyte, and better electronic and ionic conductivity, and shorter distances for cation diffusion as compared with bulk materials. 25 Nanostructured electrodes are also able to better accommodate volume changes associated with cyclic intercalation and deintercalation of lithium ions into and from the host lattice. This reduces pulverization issues associated with bulk materials and consequently improves cycle life. 62 Nanostructures such as vanadium oxide nanotubes (VONTs) and nanorods are particularly attractive in prin...

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“…81 The peaks observed between 1360-1560 cm −1 and 2850-2930 cm −1 , in Fig. 5b are due to C-H bending and asymmetric and symmetric stretching vibrations, respectively.…”

Section: Resultsmentioning

confidence: 91%

Polycrystalline Vanadium Oxide Nanorods: Growth, Structure and Improved Electrochemical Response as a Li-Ion Battery Cathode Material

McNulty

Buckley

O’Dwyer

2014

J. Electrochem. Soc.

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show abstract

“…In recent years, the emerging energy resource crisis is increasing the need for rechargeable high energy and power density batteries for electronic devices and electric vehicles have stimulated significant research activities in the cathode materials of rechargeable batteries. As a promising cathode material of Li ion and Mg rechargeable batteries, nanostructure V 2 O 5 has attracted much attention [1][2][3][4]. Due to the laminar microstructure and the large specific surface area, metal ions such as Li + insertion/de-insertion process can sufficiently occur in V 2 O 5 nanostructure [1].…”

Section: Introductionmentioning

confidence: 99%

Formation of vanadium oxides with various morphologies by chemical vapor deposition

Huang

Wang

et al. 2009

Journal of Alloys and Compounds

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“…1 a), show also additional peaks in the data, located at wavenumbers 167, 847, 882, 940 and 1034 cm -1 . These peaks are marked by black circles in Fig.1 a) and are typically seen in Raman spectra of vanadium oxide nanotubes (VOx-NT's) [27,28], where triclinic V7O16 phase is the building block of the nanotube walls [29]. It has been shown in our previous studies that, indeed, triclinic V7O16 is the phase present also in these types of PLD-deposited thin films, and is proven to appear, for the first time, as a solid state vanadium oxide phase [17,18].…”

Section: Crystal Structure and Microstructure Characterizationmentioning

confidence: 90%

Separation of valence states in thin films with mixed V2O5 and V7O16 phases

Huotari

Cao

Niu

et al. 2016

Journal of Electron Spectroscopy and Related Phenomena

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The effect of thermal annealing and laser irradiation on the microstructure of vanadium oxide nanotubes

Cited by 52 publications

References 19 publications

Polycrystalline Vanadium Oxide Nanorods: Growth, Structure and Improved Electrochemical Response as a Li-Ion Battery Cathode Material

Polycrystalline Vanadium Oxide Nanorods: Growth, Structure and Improved Electrochemical Response as a Li-Ion Battery Cathode Material

Formation of vanadium oxides with various morphologies by chemical vapor deposition

Separation of valence states in thin films with mixed V2O5 and V7O16 phases

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