Ag4V2O6F2 (SVOF): A high silver density phase and potential new cathode material for implantable cardioverter defibrillators

Frédéric Sauvage, Vincent Bodenez, Hervé Vezin, Thomas A. Albrecht, Jean Marie Tarascon, Kenneth R Poeppelmeier

Research output: Contribution to journalArticle

35 Citations (Scopus)

Abstract

The electrochemical reactivity of the cathode material Ag4V 2O6F2 (SVOF) versus lithium, with a particular emphasis on the lithium insertion mechanism, was studied by means of the complementary techniques in situ X-ray diffraction, electron paramagnetic resonance, and high-resolution transmisssion electron microscopy. This study confirms the initial reports of a high capacity for SVOF of 148 mAh/g above 3 V and that the reduction of silver above 3 V (vs Li+/Li0) leads to a loss of SVOF crystallinity until it becomes completely amorphous between the third and fourth lithiums inserted. Next, vanadium is reduced between 2.5 and 1.5 V (vs Li+/Li0) for the fifth and sixth lithiums inserted. In addition, the polarization within the cathode is significantly lower for the vanadium reduction than for the silver reduction. The silver metal morphologies consisted of nanoparticles (∼5 nm diameter) and dendrites and were both seen in samples of lithiated SVOF.

Original languageEnglish
Pages (from-to)8464-8472
Number of pages9
JournalInorganic Chemistry
Volume47
Issue number19
DOIs
Publication statusPublished - Oct 6 2008

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Implantable cardioverter defibrillators
Silver
Vanadium
Cathodes
cathodes
silver
Lithium
vanadium
lithium
High resolution electron microscopy
dendrites
Paramagnetic resonance
insertion
crystallinity
electron microscopy
electron paramagnetic resonance
reactivity
Metals
Polarization
Nanoparticles

ASJC Scopus subject areas

  • Inorganic Chemistry
  • Physical and Theoretical Chemistry

Cite this

Ag4V2O6F2 (SVOF) : A high silver density phase and potential new cathode material for implantable cardioverter defibrillators. / Sauvage, Frédéric; Bodenez, Vincent; Vezin, Hervé; Albrecht, Thomas A.; Tarascon, Jean Marie; Poeppelmeier, Kenneth R.

In: Inorganic Chemistry, Vol. 47, No. 19, 06.10.2008, p. 8464-8472.

Research output: Contribution to journalArticle

Sauvage, Frédéric ; Bodenez, Vincent ; Vezin, Hervé ; Albrecht, Thomas A. ; Tarascon, Jean Marie ; Poeppelmeier, Kenneth R. / Ag4V2O6F2 (SVOF) : A high silver density phase and potential new cathode material for implantable cardioverter defibrillators. In: Inorganic Chemistry. 2008 ; Vol. 47, No. 19. pp. 8464-8472.
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