One step synthesis of monoclinic VO{sub 2} (B) bundles of nanorods: Cathode for Li ion battery

Journal Article · Fri Jun 15 04:00:00 EDT 2012 · Materials Characterization

DOI:https://doi.org/10.1016/J.MATCHAR.2012.03.010· OSTI ID:22066456

Ganganagappa, Nagaraju ^[1]; Siddaramanna, Ashoka ^[2]

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1. Laboratory of Molecular Catalysis, Institute of Chemistry, UFRGS, Porto Alegre (Brazil)
2. Department of Materials Engineering, Indian Institute of Science, Bangalore-560012 (India)

One of the metastable phases of vanadium dioxide, VO{sub 2}(B) bundles of nanorods and microspheres have been synthesized through a simple hydrothermal method by dispersing V{sub 2}O{sub 5} in aqueous quinol. The obtained products were characterized by X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, scanning electron microscopy (SEM) and electrochemical discharge-charge test for lithium battery. It was found that the morphologies of the obtained VO{sub 2}(B) can be tuned by manipulating the relative amount of quinol. The electrochemical test found that the bundles of nanorods exhibit an initial discharge capacity of 171 mAh g{sup -1} and its almost stabilized capacity was reached to 108 mAh g{sup -1} after 47 cycles at a current density of 0.1 mA g{sup -1}. The formation mechanism of the VO{sub 2}(B) bundles of nanorods and microspheres was also discussed. - Highlights: Black-Right-Pointing-Pointer VO{sub 2}(B) bundles of nanorods and microspheres were prepared by hydrothermal route at 180 Degree-Sign C for 1 day. Black-Right-Pointing-Pointer In this method for the synthesis of VO{sub 2}(B), we are the first to use quinol as a reducing agent. Black-Right-Pointing-Pointer Morphologies of the obtained VO{sub 2}(B) can be tuned by manipulating the relative amount of quinol. Black-Right-Pointing-Pointer VO{sub 2}(B) exhibits an initial capacity of 171 mAh g{sup -1} and reached to 108 mAh g{sup -1} after 47 cycles. Black-Right-Pointing-Pointer The formation mechanism of the VO{sub 2}(B) bundles of nanorods and microspheres is also discussed.

• OSTI ID: 22066456
• Journal Information: Materials Characterization, Journal Name: Materials Characterization Journal Issue: Complete Vol. 68; ISSN 1044-5803; ISSN MACHEX
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
77 NANOSCIENCE AND NANOTECHNOLOGY
ABSORPTION SPECTROSCOPY
CATHODES
CURRENT DENSITY
ELECTROCHEMISTRY
FOURIER TRANSFORMATION
HYDROTHERMAL SYNTHESIS
INFRARED SPECTRA
LITHIUM
MICROSPHERES
MONOCLINIC LATTICES
MORPHOLOGY
NANOSTRUCTURES
REDUCING AGENTS
SCANNING ELECTRON MICROSCOPY
VANADIUM OXIDES
X-RAY DIFFRACTION