Structural study of the T#2-LixCoO2 (0.52 < x < or = 0.72) phase
Langue
en
Article de revue
Ce document a été publié dans
Inorganic Chemistry. 2004, vol. 43, n° 3, p. 914-922
American Chemical Society
Résumé en anglais
The metastable O2-LiCoO2 phase undergoes several reversible phase transitions upon lithium deintercalation. The first transition leads to an unusual oxygen stacking in such layered compounds. This stacking is found to be ...Lire la suite >
The metastable O2-LiCoO2 phase undergoes several reversible phase transitions upon lithium deintercalation. The first transition leads to an unusual oxygen stacking in such layered compounds. This stacking is found to be stable for 0.52 < x ≤ 0.72 in LixCoO2 and is called T#2. We studied this phase from a structural viewpoint using X-ray and neutron diffraction (ab initio method). The new stacking derives from the O2 one by gliding every second CoO2 slab by (1/3, 1/6, 0). The lithium ions are found to occupy very distorted tetrahedral sites in this structure. We also discuss the possibility of this T#2 phase to exhibit stacking faults, whose amount depends on the method used to prepare this deintercalated phase.< Réduire
Mots clés en anglais
Cobalt lithium oxide
Structural chemistry
Phase transition
Stacking faults
Intercalation compounds
Origine
Importé de halUnités de recherche