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Title: Solution phase synthesis of Na{sub 0.28}V{sub 2}O{sub 5} nanobelts into nanorings and the electrochemical performance in Li battery

Abstract

Graphical abstract: Hydrothermal method has been adopted first time to prepare Na{sub 0.28}V{sub 2}O{sub 5} nanorings/nanobelts without using any organic surfactant/solvents at 130–160 °C for 1–2 days. TEM analyses reveal that the products consist of nanorings of width about 500 nm and thickness of about 100 nm with inner diameter of 5–7 m. Nanobelts of width 70–100 nm and several tens of micrometers in length are observed. The electrochemical results show that Na{sub 0.28}V{sub 2}O{sub 5} exhibits an initial discharge capacity of 320 mAh g{sup −1} and its capacity still retained 175 mAh g{sup −1} even after 69 cycles. Highlights: ► We are the first to report Na{sub 0.28}V{sub 2}O{sub 5} nanorings/nanobelts by solution method. ► Synthesis via hydrothermal method at 130–160 °C/1–2d in acidic medium. ► We have carried out without using any surfactant/templates/organic solvents. ► Shows discharge capacity of 320 mAh g{sup −1} and reach 175 mAh g{sup −1} after 69 cycles. ► A probable reaction mechanism for Na{sub 0.28}V{sub 2}O{sub 5} nanorings formation is also proposed. -- Abstract: In this paper, we are the first to report a simple one step hydrothermal method to synthesize Na{sub 0.28}V{sub 2}O{sub 5} nanorings/nanobelts without using any organic surfactant/solvents at 130–160more » °C for 1–2 days. The obtained products have been characterized by X-ray diffraction (XRD), energy dispersive X-ray spectroscopy (EDS), Fourier transform infrared spectroscopy (FTIR), Raman spectroscopy, morphology by scanning electron microscopy (SEM) and transmission electron microscopy (TEM) and electrochemical discharge–charge test for lithium battery. XRD pattern exhibit a monoclinic Na{sub 0.28}V{sub 2}O{sub 5} structure. FTIR spectrum shows band at 958 cm{sup −1} is assigned to V=O stretching vibration, which is sensitive to intercalation and suggests that Na{sup +} ions are inserted between the vanadium oxide layers. TEM analyses reveal that the products consist of nanorings of width about 500 nm and thickness of about 100 nm with inner diameter of 5–7 μm. Nanobelts of width 70–100 nm and several tens of micrometers in length are observed. The electrochemical results show that nanorings/nanobelts exhibit an initial discharge capacity of 320 mAh g{sup −1} and its capacity still retained 175 mAh g{sup −1} even after 69 cycles. We have discussed the possible growth mechanism for the formation of nanorings/nanobelts.« less

Authors:
 [1];  [2];  [3]
  1. Centre for Nano and Materials Science, Jain University, Jakkasandra Post, Kanakapura (India)
  2. (India)
  3. Department of Chemistry, Central College Campus, Bangalore University, Bangalore (India)
Publication Date:
OSTI Identifier:
22215555
Resource Type:
Journal Article
Journal Name:
Materials Research Bulletin
Additional Journal Information:
Journal Volume: 47; Journal Issue: 11; Other Information: Copyright (c) 2012 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0025-5408
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 77 NANOSCIENCE AND NANOTECHNOLOGY; ELECTRIC BATTERIES; FOURIER TRANSFORM SPECTROMETERS; FOURIER TRANSFORMATION; HYDROTHERMAL SYNTHESIS; INFRARED SPECTRA; MONOCLINIC LATTICES; NANOSTRUCTURES; ORGANIC SOLVENTS; RAMAN SPECTROSCOPY; REACTION KINETICS; SCANNING ELECTRON MICROSCOPY; SURFACTANTS; TRANSMISSION ELECTRON MICROSCOPY; X-RAY DIFFRACTION; X-RAY SPECTROSCOPY

Citation Formats

Nagaraju, Ganganagappa, E-mail: nagarajugn@rediffmail.com, Department of Chemistry, Central College Campus, Bangalore University, Bangalore, and Chandrappa, Gujjarahalli Thimmanna. Solution phase synthesis of Na{sub 0.28}V{sub 2}O{sub 5} nanobelts into nanorings and the electrochemical performance in Li battery. United States: N. p., 2012. Web. doi:10.1016/J.MATERRESBULL.2012.08.010.
Nagaraju, Ganganagappa, E-mail: nagarajugn@rediffmail.com, Department of Chemistry, Central College Campus, Bangalore University, Bangalore, & Chandrappa, Gujjarahalli Thimmanna. Solution phase synthesis of Na{sub 0.28}V{sub 2}O{sub 5} nanobelts into nanorings and the electrochemical performance in Li battery. United States. doi:10.1016/J.MATERRESBULL.2012.08.010.
Nagaraju, Ganganagappa, E-mail: nagarajugn@rediffmail.com, Department of Chemistry, Central College Campus, Bangalore University, Bangalore, and Chandrappa, Gujjarahalli Thimmanna. Thu . "Solution phase synthesis of Na{sub 0.28}V{sub 2}O{sub 5} nanobelts into nanorings and the electrochemical performance in Li battery". United States. doi:10.1016/J.MATERRESBULL.2012.08.010.
@article{osti_22215555,
title = {Solution phase synthesis of Na{sub 0.28}V{sub 2}O{sub 5} nanobelts into nanorings and the electrochemical performance in Li battery},
author = {Nagaraju, Ganganagappa, E-mail: nagarajugn@rediffmail.com and Department of Chemistry, Central College Campus, Bangalore University, Bangalore and Chandrappa, Gujjarahalli Thimmanna},
abstractNote = {Graphical abstract: Hydrothermal method has been adopted first time to prepare Na{sub 0.28}V{sub 2}O{sub 5} nanorings/nanobelts without using any organic surfactant/solvents at 130–160 °C for 1–2 days. TEM analyses reveal that the products consist of nanorings of width about 500 nm and thickness of about 100 nm with inner diameter of 5–7 m. Nanobelts of width 70–100 nm and several tens of micrometers in length are observed. The electrochemical results show that Na{sub 0.28}V{sub 2}O{sub 5} exhibits an initial discharge capacity of 320 mAh g{sup −1} and its capacity still retained 175 mAh g{sup −1} even after 69 cycles. Highlights: ► We are the first to report Na{sub 0.28}V{sub 2}O{sub 5} nanorings/nanobelts by solution method. ► Synthesis via hydrothermal method at 130–160 °C/1–2d in acidic medium. ► We have carried out without using any surfactant/templates/organic solvents. ► Shows discharge capacity of 320 mAh g{sup −1} and reach 175 mAh g{sup −1} after 69 cycles. ► A probable reaction mechanism for Na{sub 0.28}V{sub 2}O{sub 5} nanorings formation is also proposed. -- Abstract: In this paper, we are the first to report a simple one step hydrothermal method to synthesize Na{sub 0.28}V{sub 2}O{sub 5} nanorings/nanobelts without using any organic surfactant/solvents at 130–160 °C for 1–2 days. The obtained products have been characterized by X-ray diffraction (XRD), energy dispersive X-ray spectroscopy (EDS), Fourier transform infrared spectroscopy (FTIR), Raman spectroscopy, morphology by scanning electron microscopy (SEM) and transmission electron microscopy (TEM) and electrochemical discharge–charge test for lithium battery. XRD pattern exhibit a monoclinic Na{sub 0.28}V{sub 2}O{sub 5} structure. FTIR spectrum shows band at 958 cm{sup −1} is assigned to V=O stretching vibration, which is sensitive to intercalation and suggests that Na{sup +} ions are inserted between the vanadium oxide layers. TEM analyses reveal that the products consist of nanorings of width about 500 nm and thickness of about 100 nm with inner diameter of 5–7 μm. Nanobelts of width 70–100 nm and several tens of micrometers in length are observed. The electrochemical results show that nanorings/nanobelts exhibit an initial discharge capacity of 320 mAh g{sup −1} and its capacity still retained 175 mAh g{sup −1} even after 69 cycles. We have discussed the possible growth mechanism for the formation of nanorings/nanobelts.},
doi = {10.1016/J.MATERRESBULL.2012.08.010},
journal = {Materials Research Bulletin},
issn = {0025-5408},
number = 11,
volume = 47,
place = {United States},
year = {2012},
month = {11}
}