FeWO<sub>4</sub>Cl as cathode material for lithium rechargeable battery
Language
en
Article de revue
This item was published in
Journal of Electroceramics. 2009, vol. 23, n° 2-4, p. 305-311
Springer Verlag
English Abstract
Lithium has been electrochemically and chemically intercalated into layered FeWP<sub>4</sub>Cl. The discharge curve between FeW0<sub>4</sub>Cl and Li<sub>2</sub>FeWO<sub>4</sub>Cl is constituted by three potential plateaux ...Read more >
Lithium has been electrochemically and chemically intercalated into layered FeWP<sub>4</sub>Cl. The discharge curve between FeW0<sub>4</sub>Cl and Li<sub>2</sub>FeWO<sub>4</sub>Cl is constituted by three potential plateaux and two domains where the cell voltage decreases rapidly upon the intercalation of lithium ions. A wide bi-phase domain is obtained for x in Li<sub>x</sub>FeW0<sub>4</sub>Cl ranging between 0.0 and 0.85. The limit of a solid solution extends in the vicinity of the LiFeWO<sub>4</sub>Cl composition. The theoretical and practical discharge capacities for Li<sub>1-x</sub>FeWO<sub>4</sub>Cl are 79.03 mAh/g and 78.45 mAh/g respectively. The structures of FeWO<sub>4</sub>Cl and LiFeWO<sub>4</sub>Cl were determined: from single crystal analysis and by Rietveld refinement of the powder X-ray diffraction pattern respectively. The modifications of the Fe-O bond lengths emphasize the iron reduction during the discharge process. Moreover, the strong change of Fe-Cl distance suggests a reversible framework modification.Read less <
English Keywords
FeWO<sub>4</sub>Cl
Lithium rechargeable battery
Cathode
Intercalation
Origin
Hal imported