57Fe Mössbauer study of the electrochemical reaction of lithium with triclinic iron vanadate - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Chemistry of Materials Année : 2000

57Fe Mössbauer study of the electrochemical reaction of lithium with triclinic iron vanadate

Résumé

The electrochemical reaction of lithium with triclinic FeVO4 (a = 6.714(1) Å, b = 8.060(2) Å, c = 9.352(2) Å, α = 96.678(1)°, β = 106.641(1)°, and γ = 101-523(1)°, P-1) has been investigated by means of 57Fe Mössbauer spectroscopy in order to complement the previous X-ray diffraction and X-ray absorption near edge structure studies on the same system. A complex FeIII → FeII → Fe0 or FeIII → FeII ,Fe0 reduction process has been detected upon the first discharge of the battery down to 0.02 V, with in addition the iron reoxidation during the next charge step. A mechanism based on "lithium adsorption" is proposed in order to explain this unexpected behavior.

Domaines

Matériaux

Dates et versions

hal-01560715 , version 1 (11-07-2017)

Identifiants

Citer

S. Denis, Rémi Dedryvère, E. Baudrin, S. Laruelle, M. Touboul, et al.. 57Fe Mössbauer study of the electrochemical reaction of lithium with triclinic iron vanadate. Chemistry of Materials, 2000, 12 (12), pp.3733-3739. ⟨10.1021/cm001084d⟩. ⟨hal-01560715⟩
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