Effects of aluminum on the structural and electrochemical properties of LiNiO2
Langue
en
Article de revue
Ce document a été publié dans
Journal of Power Sources. 2003, vol. 115, n° 2, p. 305-314
Elsevier
Résumé en anglais
LiNi1−yAlyO2 (0.10≤y≤0.50) compounds have been synthesized by a coprecipitation method. The characterization of the samples by X-ray and neutron diffraction, associated with Rietveld refinement analysis, has shown that for ...Lire la suite >
LiNi1−yAlyO2 (0.10≤y≤0.50) compounds have been synthesized by a coprecipitation method. The characterization of the samples by X-ray and neutron diffraction, associated with Rietveld refinement analysis, has shown that for all materials, about 5% extra-nickel ions are present in the interslab space. Charge−discharge cycling of LiNi1−yAlyO2 as positive electrode material in lithium cells has shown that aluminum substitution suppresses all the phase transitions observed for the LiNiO2 system. Good cycling stability was observed, but the capacity decreases from 125 to 100 mAh/g by increasing the aluminum amount from 10 to 25% (3–4.15 V range; C/20 rate).< Réduire
Mots clés en anglais
Intercalation
Lithium battery
LiNiO2
Aluminum substitution
Diffraction
Origine
Importé de halUnités de recherche