Microwave-assisted V₂O₅ nanoflowers for efficient lithium-ion battery

ABSTRACT

A facile approach to synthesise V₂O₅ nanoflowers are adopted through the microwave-assisted method. The as-prepared V₂O₅ was characterised by the X-ray diffraction, scanning electron microscopy analyses. The X-ray diffraction spectra confirmed the formation of the orthorhombic crystal structure of V₂O₅ nanoflowers with an average crystallite size of 20 nm. FTIR results showed the V-O-V stretching mode vibration at 442 cm⁻¹. The above material has studied as cathode material for lithium-ion batteries (LIB) at C/10 rate and the results showed, V₂O₅ nanoflowers delivered the specific capacity of 241 mAh g⁻¹ than the commercial V₂O₅ of 98 mAh g⁻¹ at 1.5–4.0 V apart from this, better cycle stability over 100 charge-discharge cycles and reasonable discharge capacities obtained at high C-rates. These results suggest enhancement of LIB capacity due to high surface area and good porosity of mesoporous V₂O₅ nanoflowers.

KEYWORDS:

• V₂O₅ nanoflowers
• microwave-assisted method
• cathode
• lithium-ion battery

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Retraction

Statement of novelty

• V₂O₅ nanoflowers were prepared by microwave-assisted method.

• Prepared V₂O₅ nanoflowers were characterised by structural (XRD, FTIR) and morphological (SEM) studies.

• V₂O₅ material is good cathode material for lithium-ion batteries.

Disclosure statement

No potential conflict of interest was reported by the authors.

Additional information

Notes on contributors

K. Karthik

K. Karthik did Ph. D work on “Photocatalytic and Biological Studies of Metal Oxide Nanoparticles and Nanocomposites“. He has published more than 25 research articles in reputed journals. He has total citations: 238, h-index: 10, i-10 index: 10 (From Google scholar citations: https://scholar.google.co.in/citations?user=hU-0UQsAAAAJ&hl=en). He is a very active member in ResearchGate and his RG score: 60.60, Total Research Interest: 927.2, Recommendations: 13,584, Reads: 55,826 (From Research Gate: https://www.researchgate.net/profile/K_Karthik7). He has participated in more than 25 international and national conferences. His field of research includes crystal growth, semiconductors nanostructured materials, nanomaterials, biomaterials, thin films, bimetallic and trimetallic nanocomposite materials for energy, environmental and biological applications. He is the active reviewer for various reputed journals.

K. Pradeeswari

K. Pradeeswari is currently working as Research Scholar in the Department of Physics, Presidency College, Chennai – 600 005, India. Her field of research includes Metal oxide nanoparticles and composites for lithium-ion battery (energy storage) applications.

R. Mohan Kumar

R. Mohan Kumar is currently working as an Assistant Professor in the Department of Physics, Presidency College, Chennai – 600 005, India. He has published more than 150 research articles in reputed journals. He has the total citations:1961, H-index: 25, i-10 index: 59 (From Google Scholar citations).

R. Murugesan

R. Murugesan is currently working as an Assistant Professor in the Department of Physics, Thiru Kolanjiappar Government Arts College, Virudhachalam – 606 001, India. His field of research includes Nanostructured materials and thin films for energy, optoelectronic and spintronics applications.