Synthesis and electrochemical evaluation of high capacity nanostructured VO2 cathodes

Research output: Contribution to journalArticle

60 Citations (Scopus)

Abstract

A metastable form of vanadium dioxide - designated as VO2(B) - has been synthesized by an ambient temperature reduction of aqueous vanadate ions with potassium borohydride and sodium dithionite followed by heating in vacuum at 230 °C. The samples have been characterized by X-ray diffraction, thermogravimetric analysis (TGA), infrared spectroscopy, scanning electron microscopy (SEM), and electrochemical discharge-charge cycling in lithium cells. These oxides exhibit a high reversible capacity of>300 mAh/g at 3.5-1 V and a moderate reversible capacity of close to 200 mAh/g at 3.5-2 V with good cyclability in a wide temperature range of -30 to 60 °C. Also, the VO2(B) cathodes exhibit excellent safety characteristics as indicated by the absence of exothermic peaks below 350 °C in differential scanning calorimetry (DSC).

Original languageEnglish (US)
Pages (from-to)265-271
Number of pages7
JournalSolid State Ionics
Volume159
Issue number3-4
DOIs
StatePublished - Apr 2003
Externally publishedYes

Fingerprint

Cathodes
cathodes
Dithionite
Vanadates
vanadates
borohydrides
evaluation
synthesis
dioxides
Lithium
Vanadium
Oxides
vanadium
ambient temperature
Potassium
Thermogravimetric analysis
Differential scanning calorimetry
Infrared spectroscopy
safety
potassium

Keywords

  • Charge-discharge cycling
  • Chemical synthesis
  • Lithium-ion battery
  • Vanadium oxide

ASJC Scopus subject areas

  • Electrochemistry
  • Physical and Theoretical Chemistry
  • Energy Engineering and Power Technology
  • Materials Chemistry
  • Condensed Matter Physics

Cite this

Synthesis and electrochemical evaluation of high capacity nanostructured VO2 cathodes. / Mada Kannan, Arunachala; Manthiram, A.

In: Solid State Ionics, Vol. 159, No. 3-4, 04.2003, p. 265-271.

Research output: Contribution to journalArticle

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